A cell phone provider offers a plan that costs ​$30 per month plus ​$0.20 per text message sent or received. A comparable plan costs ​$40 per month but offers unlimited text messaging. Complete parts a. and b. below.

Answers

Answer 1

The number of text messages for which the costs will be the same is of:

50 messages.

How to define a linear function?

The slope-intercept representation of a linear function is given by the equation presented as follows:

y = mx + b

The coefficients of the function and their meaning are described as follows:

m is the slope of the function, representing the change in the output variable y when the input variable x is increased by one.b is the y-intercept of the function, which is the initial value of the function, i.e., the numeric value of the function when the input variable x assumes a value of 0. On a graph, it is the value of y when the graph of the function crosses the y-axis.

For each plan, the slope and the intercept are given as follows:

Slope: cost per message.Intercept: Fixed costs.

Hence the functions are given as follows:

A(x) = 30 + 0.2x.B(x) = 40.

The costs will be the same when:

A(x) = B(x)

Hence:

30 + 0.2x = 40

0.2x = 10

x = 100/2

x = 50 messages.

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Related Questions

Jesse is helping his grandmother plant a garden in the shape of the trapezoid shown below. What is the area, in square feet, of this garden?
The base one is 12.5 feet long.
Base two is 0.5 times the length of base one.
The height is 10 feet.
A.28.75
B.93.75
C. 125.00
D.187.50

Answers

Answer:

B. 93.75 ft

Step-by-step explanation:

The area of a trapezoid is found by the equation Area=1/2(base 1 + base 2)*height

Known:

Base 1 = 12.5 ft

Base 2 = .5*Base 1 = .5*12.5 = 6.25 ft

Height = 10 ft

We can plug these numbers into the formula

Area=1/2(12.5+6.25)*10

Solving the equation, we get Area = 93.75 ft

Let v be the vector with initial point (1,4) and terminal point (5, -3). Find the vertical component of this vector. a) -3 b) -7 c) -4 d) -8 e) 4 f) ONone of the above

Answers

The vertical component of the vector with initial point (1,4) and terminal point (5, -3) is -7. The correct option is b).

We need to find the vertical component of the vector v with initial point (1, 4) and terminal point (5, -3).

Step 1: Determine the coordinates of the vector v.
The coordinates of v can be found by subtracting the initial point coordinates from the terminal point coordinates.

v = (5 - 1, -3 - 4)
v = (4, -7)

Step 2: Identify the vertical component.
The vertical component is the second coordinate of the vector, which represents the change in the vertical (y) direction.

In this case, the vertical component of vector v is -7. So, the correct answer is b).

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There are two independent samples. The first sample is drawn from a population with normal distribution Nlui, 6.2%), and the sample mean is 11.2 and the sample size is 45. The second sample is also drawn from a normal distribution N(uz, 8.12), and the sample mean is 12.0 and the sample size is 66. 1.1 If you hypothesize that the two samples' populations have the same population mean, choose an appropriate method and evaluate the hypothesis. (0.5 point) 1.2 If you hypothesize that the first sample has a lower population mean than the second sample, choose an appropriate method and evaluate the hypothesis. (0.5 point)

Answers

Tthere is enough evidence to support the claim that the population mean of the first sample is lower than the population mean of the second sample.To evaluate the hypothesis that the two samples' populations have the same population mean, we can use a two-sample t-test with equal variances assumption.

To evaluate the hypothesis that the two samples' populations have the same population mean, we can use a two-sample t-test with equal variances assumption. The null hypothesis is that the population means of the two samples are equal, and the alternative hypothesis is that they are not equal.
To conduct the t-test, we first calculate the pooled standard deviation using the formula:
sp = sqrt(((n1-1)s1^2 + (n2-1)s2^2) / (n1 + n2 - 2))
where n1 and n2 are the sample sizes, s1 and s2 are the sample standard deviations, and sp is the pooled standard deviation.
Substituting the values, we get:
sp = sqrt(((45-1) * 6.2^2 + (66-1) * 8.12^2) / (45 + 66 - 2)) = 7.50
Next, we calculate the t-statistic using the formula:
t = (x1 - x2) / (sp * sqrt(1/n1 + 1/n2))
where x1 and x2 are the sample means. Substituting the values, we get:
t = (11.2 - 12.0) / (7.50 * sqrt(1/45 + 1/66)) = -1.83
The degrees of freedom for the t-distribution is (n1 + n2 - 2) = 109. Using a significance level of 0.05 and a two-tailed test, the critical t-value is ±1.98. Since our calculated t-value (-1.83) falls within the acceptance region, we fail to reject the null hypothesis. Therefore, we can conclude that there is not enough evidence to support the claim that the population means of the two samples are different.
1.2 To evaluate the hypothesis that the first sample has a lower population mean than the second sample, we can use a one-tailed t-test with unequal variances assumption. The null hypothesis is that the population mean of the first sample is greater than or equal to the population mean of the second sample, and the alternative hypothesis is that the population mean of the first sample is less than the population mean of the second sample.
We can calculate the t-statistic using the formula:
t = (x1 - x2) / sqrt(s1^2/n1 + s2^2/n2)
where s1 and s2 are the sample standard deviations, and n1 and n2 are the sample sizes. Substituting the values, we get:
t = (11.2 - 12.0) / sqrt(6.2^2/45 + 8.12^2/66) = -1.97
The degrees of freedom for the t-distribution is given by the Welch-Satterthwaite formula:
df = (s1^2/n1 + s2^2/n2)^2 / (s1^4/(n1^2 * (n1-1)) + s2^4/(n2^2 * (n2-1)))
Substituting the values, we get:
df = (6.2^2/45 + 8.12^2/66)^2 / (6.2^4/(45^2 * 44) + 8.12^4/(66^2 * 65)) = 96.05
Using a significance level of 0.05 and a one-tailed test, the critical t-value is -1.66. Since our calculated t-value (-1.97) is less than the critical t-value, we reject the null hypothesis. Therefore, we can conclude that there is enough evidence to support the claim that the population mean of the first sample is lower than the population mean of the second sample.

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How much money would be in an account after 5 years that pays 3% interest, compounded quarterly (4 times per year) if the initial investment is $750? (Round your answer to the nearest penny)

Answers

The balance in the account after 5 years with quarterly compounding at a 3% annual interest rate, starting with an initial investment of $750, would be $859.43.

To calculate the balance in the account after 5 years with quarterly compounding at a 3% annual interest rate, we can use the formula for compound interest:

[tex]A = P (1 + r/n)^(^n^t^)[/tex]

where:

A is the final amount or balance in the account

P is the initial investment or principal amount

r is the annual interest rate expressed as a decimal (3% = 0.03)

n is the number of times the interest is compounded per year (4 for quarterly)

t is the time in years

Plugging in the given values, we get:

A = $750 (1 + 0.03/4)²⁰

= $750(1.0075)²⁰

=$750×1.161

=$870.75

Hence,  the balance in the account after 5 years with quarterly compounding at a 3% annual interest rate, starting with an initial investment of $750, would be $870.75

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if the number of participants in group 1 = 32 and the number in group 2 = 30, what is the associated degrees of freedom? a. 58 b. 60 c. 62 d. 59

Answers

For the given groups, the degrees of freedom is obtained to be, Option (b) : 60.

What is degrees of freedom?

The number of variables that can vary in a calculation is represented by the degrees of freedom, which are mathematical notions used in statistical calculations. Among other tests, degree of freedom calculations can help confirm the validity of chi-square test statistics, t-tests, and highly f-tests.

The formula for degrees of freedom in a two-sample t-test with independent samples is -

df = (n1 - 1) + (n2 - 1)

where n1 and n2 are the sample sizes of the two groups.

Substituting n1 = 32 and n2 = 30, we get -

df = (32 - 1) + (30 - 1)

= 31 + 29

= 60

Therefore, the associated degrees of freedom is 60.

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solve the given initial-value problem. 5y'' y' = −4x, y(0) = 0, y'(0) = −15

Answers

The solution to the initial-value problem 5y'' y' = −4x is y = -4x^2 - 75e^(-x/5), and this is the function that satisfies the differential equation with the given initial conditions.

To solve the given initial-value problem, we need to use the method of undetermined coefficients to find a particular solution and the complementary solution to get the general solution.

First, we assume a particular solution of the form y₁ = Ax + B, where A and B are constants to be determined. Taking the first and second derivatives of y₁, we get y'₁ = A and y''₁ = 0. Substituting these into the differential equation, we get 5(0) + A = -4x, which gives A = -4x. Therefore, the particular solution is y₁ = -4x^2 + B.

Next, we find the complementary solution by solving the associated homogeneous differential equation, which is 5y'' + y' = 0. To solve this, we assume a solution of the form y₂ = e^(rx), where r is a constant to be determined.

Substituting this into the differential equation, we get the characteristic equation 5r^2 + r = 0, which has roots r = 0 and r = -1/5. Therefore, the complementary solution is y₂ = C1 + C2e^(-x/5).

Using the initial conditions y(0) = 0 and y'(0) = -15, we can solve for the constants B, C1, and C2. Substituting y(0) = 0 into the general solution y = y₁ + y₂, we get B + C1 = 0, which gives B = -C1.

Next, we differentiate y₁ to get y'₁  = -8x, and substitute y'(0) = -15 into the general solution y = y₁ + y₂, we get -8(0) + C2(-1/5) = -15, which gives C2 = 75.

Finally, we substitute B = -C1 and C2 = 75 into the general solution y = y₁ + y₂, we get y = -4x^2 - 75e^(-x/5).

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A jug of milk holds 4 quarts. How many liters of milk does the jug hold? Round your answer to the nearest hundredth of a liter. 1 L ≈ 1. 06 qt

Answers

The jug holds approximately 3.77 liters of milk.

Liters (or litres) are a unit of volume in the metric system. One liter is equal to 1000 cubic centimeters (cc) or milliliters (ml). Liters are commonly used to measure the volume of liquids and gases, as well as the capacity of containers.

We can use the conversion factor 1 L ≈ 1.06 qt to convert from quarts to liters.

The jug holds 4 quarts, so we can convert this to liters as follows:

[tex]4 qt[/tex] × [tex](1 L / 1.06 qt) = 3.77 L[/tex] (rounded to the nearest hundredth)

Therefore, the jug holds approximately 3.77 liters of milk.

Rounding to the nearest hundredth means rounding to two decimal places. Therefore, the answer should be rounded to two decimal places or nearest hundredth of a liter.

For example, to round the number 3.14159 to two decimal places, we look at the third decimal place, which is 1. Since 1 is less than 5, we leave the second decimal place (4) unchanged. Therefore, 3.14159 rounded to two decimal places is 3.14.

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9, To find the height of a pole, a surveyor moves 140 feet away from the
base of the pole and then, with a transit 4 feet tall, measures the angle
of elevation to the top of the pole tO be 44°. To the nearest foot, whal
is the height of the pole?

Answers

Answer:

139.2

Step-by-step explanation:

Find the perimeter of the figure

Answers

The total perimeter of the given composite figure is: 38.566 cm

What is the Perimeter of the composite figure?

The perimeter is simply defined as the length of the boundary that makes up the given figure.

The perimeter of the rectangle sides is:

P1 = 8 + 10 + 8 = 26 cm

The perimeter of the semi circle is same as the circumference of a semi circle. Thus:

P2 = πr

= π * 8/2

= 12.566 cm

Thus:

Total perimeter = 12.566 + 26

= 38.566 cm

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Suppose two lines go through the given points. Line 1: Line 2: a) Find the slope of Line 1. b) Find the slope of Line 2. (4, 21), (1,0) 16 (5, 1), (-5, 26) 7 c) Are Line 1 and Line 2 parallel, perpendicular, or neither?​

Answers

The slope of Line 1 is equal to 7.

The slope of Line 1 is equal to 1/7.

Line 1 and Line 2 are neither parallel nor perpendicular.

How to calculate the slope of a line?

In Mathematics and Geometry, the slope of any straight line can be determined by using this mathematical equation;

Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

For line 1, we have the following:

Slope (m) = (32 - (-45))/(5 - (-6))

Slope (m) = (32 + 45)/(5 + 6)

Slope (m) = 77/11

Slope (m) = 7.

For line 2, we have the following:

Slope (m) = (43/7 - (-48/7))/(1 - 6)

Slope (m) = (-5/7)/(-5)

Slope (m) = 5/35

Slope (m) = 1/7

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

A college offers 2 introductory courses in history, 2 in science, 1 in mathematics, 4 in philosophy, and 2 in English.
a. If a freshman takes one course in each area during her first semester, how many course selections are possible?
b. If a part time student can afford to take only one introductory course, how many selections are possible?

Answers

Answer:

a. To find the number of possible course selections for a freshman who takes one course in each area during her first semester, we simply multiply the number of options for each area:

2 x 2 x 1 x 4 x 2 = 32

Therefore, there are 32 possible course selections.

b. To find the number of possible selections for a part-time student who can afford to take only one introductory course, we add up the number of options in each area:

2 + 2 + 1 + 4 + 2 = 11

Therefore, there are 11 possible course selections for a part-time student who can afford to take only one introductory course.

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Step-by-step explanation:

in order to maintain accuracy, political polling groups must maintain a certain degree of confidence with a small margin of error. five thirty eight is a polling company that wishes to survey a population of people, but maintain a margin of error of 0.05 or less with a 99% confidence level. what is the smallest number of consumers they should survey to guarantee this?

Answers

To maintain a margin of error of 0.05 or less with a 99% confidence level, the polling company Five Thirty Eight must survey a minimum of 1068 consumers.

To find the minimum sample size required for a margin of error of 0.05 or less with a 99% confidence level, we can use the formula:

n = (z^2 * p * q) / E^2

where

z = the z-score associated with the desired confidence level (2.58 for 99%)

p = the estimated proportion of the population that has the attribute being measured (0.5 for maximum margin of error)

q = 1 - p

E = the desired margin of error (0.05)

Substituting the values, we get

n = (2.58^2 * 0.5 * 0.5) / 0.05^2

n = 1067.44

Rounding up to the nearest whole number, we get a minimum sample size of 1068 consumers that Five Thirty Eight should survey to guarantee a margin of error of 0.05 or less with a 99% confidence level.

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The length of the polar curve curve r=7cos 4 ( 4 θ ​ ),0≤θ≤2π is equal to a. 3/112 ​ b. 3/28 ​c.28 d. 3/56 ​ e. 3/224 ​ ​

Answers

The length of the polar curve r=7cos^4(θ/4),0≤θ≤2π is equal to 3/28. Hence, the correct answer is option (b).

To find the length of the polar curve given by r=7cos^4(θ/4), we use the formula:

L = ∫(a to b) √[r(θ)^2 + (dr/dθ)^2] dθ

where a and b are the limits of integration.

First, we need to find the derivative of r(θ):

dr/dθ = -7cos^3(θ/4)sin(θ/4)

Next, we can substitute r(θ) and dr/dθ into the above formula and simplify:

L = [tex]\int\limits^{2 \pi}_0[/tex] √[7cos^8(θ/4) + 49cos^6(θ/4)sin^2(θ/4)] dθ

L = 7[tex]\int\limits^{2 \pi}_0[/tex] cos^4(θ/4)√[1 + 7sin^2(θ/4)] dθ

Next, we use the substitution u = sin(θ/4), du/dθ = 1/4cos(θ/4), and simplify:

L = 28[tex]\int\limits^1_0[/tex] (1-u^2)^(3/2)√[1+7u^2] du

Now, we can use the substitution v = (1-u^2)^(1/2), dv = -u/[(1-u^2)^(1/2)] du, and simplify:

L = 28[tex]\int\limits^1_0[/tex] v^2(1-v^2)√[8v^2+1] dv

This integral can be solved using standard integration techniques. After simplification, we get:

L = 3/28

Therefore,  the correct answer is option (b).

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8th grade math
i will give 60 points
and will pick best annswer

Answers

The parameters a and b must be set to 1 and 20, respectively, for the function to be linear.

By examining whether the differences between any two sets of y-values are proportionate to the differences between their corresponding x-values, we may establish if the function is linear or not.

Let's figure out the variations:

2 - (-4) = 8 is the difference between the y-values of the second and first pairings.

The x-values of the second and first pairings differ by a - (-3) = a + 3.

The third and second pairings' y-values differ by 10 - 4 = 6, which is how many.

The third and second pairings' x-values differ by 4 - a.

The fourth and third pairings' y-values differ by b - 10, which is 10.

The fourth and third pairings' x-values differ by 9 - 4 = 5.

For the function to be linear, these ratios of differences should be equal:

8 / (a + 3) = 6 / (4 - a) = (b - 10) / 5

Simplifying the first ratio gives us: 8 / (a + 3) = 2 / (a + 3/4), which can only be true if a = 1.

Substituting a = 1 in the third ratio, we get:

(b - 10) / 5 = (b - 10) / (4 - 1)

3(b - 10) = 5(b - 10)

2b = 40

b = 20

Therefore, the values for a and b that would result in the function being linear are:

a = 1; b = 20

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A rose garden is formed by joining a rectangle and a semicircle, as shown below. The rectangle is 21ft long and 14ft wide. If the gardener wants to build a fence around the garden, how many feet of fence are required?

Answers

Answer: 70

Step-by-step explanation: 21+21+14+14

Tell whether a triangle can have sides with lengths 35, 50, and 10.

Answers

Answer:

NO

Step-by-step explanation:

We can know the answer by using the Pythagorean Theorem.

In a triangle with uneven sides, the longest side is called the hypotenuse. In this case, it is 50.

   Using the theorem: a² + b² = c²  

(Let's say c is the hypotenuse and a and b are the other sides)

    10² + 35² = 50²

    100 + 1225 = 2500

    1325 ≠ 2500

So the answer is NO

Answer:

False

Step-by-step explanation:

Compare profiles of temperature and salinity for Argo Float 108683 (ArgosID) in the Eastern Tropical North Pacific on April 16, 2012 (Profile 001) and April 16, 2016 (profile 138). Your first challenge is to first find the data. Make your own plots of temperature with depth, and salinity with depth (don't forget axis labels and units!). Compare the shape of the profiles as well as the surface features. Estimate the mixed layer depth and the main thermocline depths. Explain what you would expect the temperature profiles to look like in this region based on what you know about general ocean circulation. Why do you think there were differences between years?

Answers

To compare the profiles of temperature and salinity for Argo Float 108683 in the Eastern Tropical North Pacific on April 16, 2012 (Profile 001) and April 16, 2016 (Profile 138), follow these steps:

Locate the data: Visit the Argo Data Management site (http://www.argodatamgt.org/) and search for Argo Float 108683 using the ArgosID. Download the data for the specific dates (April 16, 2012, and April 16, 2016).

Plot the graphs: Using a data analysis tool like Excel or Python, create plots of temperature with depth and salinity with depth for both profiles. Ensure that you label the axes and include units.
Compare the profiles: Examine the shapes of the temperature and salinity profiles for both years, focusing on the mixed layer depth and the main thermocline depths.

Based on general ocean circulation, we would expect temperature profiles in the Eastern Tropical North Pacific to show a well-mixed layer near the surface with a rapid temperature decrease below the mixed layer depth, leading to the main thermocline.

Differences between years could be attributed to several factors, such as variations in seasonal weather patterns, changes in ocean circulation, or anomalies like El Niño events. These factors could affect the mixed layer depth, main thermocline depths, and surface features, leading to differences in the temperature and salinity profiles for the two years.

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Josiah kept track of how many songs of each genre were played in an hour from his MP3 player. The counts are displayed in the table below. He has a total of 1,500 songs on his player. Josiah predicted the number of rock songs on his MP3 player to be 300 songs. Which statements about his solution are true? Select three choices.

Josiah’s Music
Sample 1
Sample 2
R & B
5
R & B
4
Pop
4
Pop
3
Classical
3
Classical
5
Jazz
2
Jazz
4
Rock
6
Rock
4

Josiah’s work:

StartFraction 10 over 20 EndFraction = StartFraction x over 1,500 EndFraction. StartFraction 10 times 30 over 20 times 30 EndFraction = StartFraction x over 1,500 EndFraction. 300 = x.
He should have found the average of the number of rock songs by averaging 4 and 6 to get 5.
He did not multiply the numerator and denominator by the correct number to equal 1,500.
His answer will be one-half of what he got because he did not divide 10 by 2 when setting up the proportion.
He can only solve the proportion by multiplying the numerator and denominator by a common multiple.
He should have multiplied the numerator and denominator by 75, not 30, because 20 times 75 = 1,500.

Answers

Answer:

The true statements are:

He should have found the average of the number of rock songs by averaging 4 and 6 to get 5.He did not multiply the numerator and denominator by the correct number to equal 1,500.He should have multiplied the numerator and denominator by 75, not 30, because 20 × 75 = 1500.

Step-by-step explanation:

Given table displaying the counts of how many songs of each genre were played in an hour from Josiah's MP3 player:

[tex]\begin{array}{|l|c||l|c|}\cline{1-4}\vphantom{\dfrac12}\sf Sample \;1&\phantom{www} &\sf Sample\;2&\phantom{www} \\\cline{1-4}\vphantom{\dfrac12}\textsf{R\&B} &5 & \textsf{R\&B} & 4\\\cline{1-4}\vphantom{\dfrac12}\sf Pop & 4 &\sf Pop & 3\\\cline{1-4}\vphantom{\dfrac12}\sf Classical & 3 & \sf Classical & 5\\\cline{1-4}\vphantom{\dfrac12}\sf Jazz & 2 & \sf Jazz & 4\\\cline{1-4}\vphantom{\dfrac12}\sf Rock & 6 & \sf Rock & 4\\\cline{1-4}\end{array}[/tex]

The total number of songs in Sample 1 is 20, of which 6 are rock songs.

The total number of songs in Sample 2 is 20, of which 4 are rock songs.

Josiah's work to predict the number of rock songs he has on his MP3 player given he has a total of 1,500 songs on his player:

[tex]\dfrac{10}{20}=\dfrac{x}{1500}[/tex]

[tex]\dfrac{10 \times 30}{20 \times 30}=\dfrac{x}{1500}[/tex]

[tex]300=x[/tex]

The total number of rock songs from both samples is 10. So there are 10 rock songs from a total sample of 40 songs.

As Josiah used a total sample of 20 songs in his calculations, he should have found the average of the number of rock songs by averaging 4 and 6 to get 5.

Looking at Josiah's calculations, he did not multiply the numerator and denominator by the correct number to equal 1,500.  He should have multiplied the numerator and denominator by 75, not 30, because 20 times 75 = 1,500.

The correct work is as follows:

[tex]\dfrac{5}{20}=\dfrac{x}{1500}[/tex]

[tex]\dfrac{5\times 75}{20 \times 75}=\dfrac{x}{1500}[/tex]

[tex]375=x[/tex]

Therefore, the number of predicted rock songs on Josiah's MP3 player is 375.

Therefore, the true statements about his solution are:

He should have found the average of the number of rock songs by averaging 4 and 6 to get 5.He did not multiply the numerator and denominator by the correct number to equal 1,500.He should have multiplied the numerator and denominator by 75, not 30, because 20 × 75 = 1500.

HELP ASAP
6. The measure of ZE, the angle of elevation from point A to point B, is (3x + 1). The measure of LD
, the angle of depression from point B to point A, is 2(x+8). Find the measure of each angle.
mZE = 22°, m/D = 30°
mZE = 15°,m/D = 15°
mZE = 46°, m/D = 46°
mZE = 52°, m/D = 50°

Answers

Measure of angle E, m ∠E = 46°

Measure of angle D, m ∠D = 46°

The correct option is the third option m∠E = 46°, m∠D = 46°

Angles of elevation and Depression: Calculating the measure of angles

From the question, we are to determine the measure of each angle.

From the given information,

The measure of ∠E, the angle of elevation from point A to point B, is (3x + 1).

The measure of ∠D, the angle of depression from point B to point A, is 2(x+8).

This means

The measure of ∠E = The measure of ∠D

(3x + 1)° = 2(x + 8)°

Solve for x

3x + 1 = 2(x + 8)

3x + 1 = 2x + 16

3x - 2x = 16 - 1

x = 15

Measure of ∠E = (3x + 1)°

Measure of ∠E = (3(15) + 1)°

Measure of ∠E = (45 + 1)°

Measure of ∠E = 46°

But,

Measure of ∠E = Measure of ∠D

Thus,

Measure of ∠D = 46°

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Anyone who speaks Spanish know how to do this????

Answers

According to the information, the paragraph would look like this: To get to my house, (1. go) to the bus station and (2. take) bus number 40...

How to complete the paragraph?

To complete the paragraph we must read the available information and identify the correct way to fill in each blank by conjugating the verb in parentheses. Once we have completed this procedure we can complete the fragment. According to the above, we can infer that the complete paragraph would look like this:

To get to my house, (1. go) to the bus station and (2. take) bus number 40. (3. Get off) at the corner of Correo and Piedras streets. (4. Walk) one block, (5. enter) the Cortés building and (6. go up) to the third floor. My apartment is number thirty-two.

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Write the equation of the circle with the segment whose endpoints are (-2,5) and (4,7) as the diameter. (Hint.... the center of a circle is the midpoint of the diameter.)

Answers

Answer:

Step-by-step explanation:

The center of a circle is the midpoint of its diameter. The midpoint of the segment whose endpoints are (-2,5) and (4,7) is:

((-2 + 4)/2, (5 + 7)/2) = (1, 6)

Therefore, the center of the circle is (1, 6), and its radius is half the length of the diameter:

r = sqrt((4 - (-2))^2 + (7 - 5)^2)/2 = sqrt(40)/2 = sqrt(10)

The equation of a circle with center (h, k) and radius r is:

(x - h)^2 + (y - k)^2 = r^2

Substituting the values of (h, k, r) into the equation, we get:

(x - 1)^2 + (y - 6)^2 = 10

Therefore, the equation of the circle with the segment whose endpoints are (-2,5) and (4,7) as the diameter is:

(x - 1)^2 + (y - 6)^2 = 10

Vectors u = −2(cos 30°i + sin30°j), v = 6(cos 225°i + sin225°j), and w = 8(cos 120°i + sin120°j) are given. Use exact values when evaluating sine and cosine.

Part A: Convert the vectors to component form and find −7(u • v). Show every step of your work. (4 points)

Part B: Convert the vectors to component form and use the dot product to determine if u and w are parallel, orthogonal, or neither. Justify your answer. (6 points)

Answers

A. The required vectors to component form as:  -7(u • v) = -21√(6).

B. u and w are neither parallel nor orthogonal.

Part A:

The vectors are given as:

u = −2(cos 30°i + sin30°j),

v = 6(cos 225°i + sin225°j),

w = 8(cos 120°i + sin120°j)

So we have:

u = -2(√(3)/2 i + 1/2 j) = -√(3) i - j

v = 6(-√(2)/2 i - sqrt(2)/2 j) = -√(2) i - √(2) j

w = 8(-1/2 i + √(3)/2 j) = -4i + √(3) j

To find -7(u • v), we first need to find the dot product of u and v:

u • v = (-√(3))( -√(2) ) + (-1)(-√(2)) = √(6)

Then, we can multiply by -7:

-7(u • v) = -7(√(6)) = -√(6)

Therefore, -7(u • v) = -21√(6).

Part B:

To determine if u and w are parallel, orthogonal, or neither, we can use the dot product:

u • w = (-√(3))(-4) + (-1)(4√(3)) = -8√(3)

Since the dot product is not equal to 0, we know that u and w are not orthogonal. To determine if they are parallel, we can compare their direction vectors:

The direction vector of u is < -√(3), -1 >, and the direction vector of w is < -4, 4√(3) >.

If u and w are parallel, then their direction vectors will be scalar multiples of each other.

So we need to check if there exists a scalar k such that:

< -√(3), -1 > = k < -4, 4√(3) >

This is equivalent to the system of equations:

-k × 4 = -√(3)

k × 4√(3) = -1

Solving for k, we get:

k = √(3)/12

Since k is not a real number, we know that u and w are not parallel.

Therefore, u and w are neither parallel nor orthogonal.

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Your smartphone has 64.8 gigabytes of storage. Your friend has 0.8 times as
many gigabytes on his smartphone. How many gigabytes of storage does
your friend's smartphone have?

Answers

Answer:

51.84 gigabytes

Step-by-step explanation:

which distribution is least likely to be skewed to the right by high values? I have already gotten the accident answer wrong.
Annual incomes of n passengers on a flight from New York to London
Weekend gambling losses of n customers at a major casino
Accident damage losses by n renters of an auto rental company
Cost of a plain McDonald's hamburger in n U.S. cities

Answers

The distribution least likely to be skewed to the right by high values is: Cost of a plain McDonald's hamburger in n U.S. cities.





1. Annual incomes of n passengers on a flight from New York to London: Incomes can have a wide range and could include extremely high values, causing a right skew.

2. Weekend gambling losses of n customers at a major casino: Gambling losses can also have a wide range and may include a few customers with significant losses, causing a right skew.

3. Accident damage losses by n renters of an auto rental company: This distribution could have a few cases with very high losses, causing a right skew.

4. Cost of a plain McDonald's hamburger in n U.S. cities: The price of a McDonald's hamburger is relatively consistent across cities and would not likely have extreme high values, making it the least likely to be skewed to the right.

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A group of friends have been surveyed. 38% have been to Canada. 80% have been to France. 11% have been to neither Canada or France. Find the percentage of the group that have been to Canada and France.​

Answers

Answer: 29%

Step-by-step explanation:

Let's use the formula of the Inclusion-Exclusion Principle to find the percentage of the group that have been to both Canada and France:

P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

In this case, A represents the people who have been to Canada, B represents the people who have been to France, and A ∩ B represents the people who have been to both Canada and France.

We are given:

P(A) = 0.38 (38% have been to Canada)

P(B) = 0.80 (80% have been to France)

P(A ∪ B) = 1 - P(neither) = 1 - 0.11 = 0.89 (since 11% have been to neither Canada or France, 89% have been to at least one of them)

Now, we can find the percentage of the group that have been to both Canada and France (P(A ∩ B)):

0.89 = 0.38 + 0.80 - P(A ∩ B)

P(A ∩ B) = 0.38 + 0.80 - 0.89

P(A ∩ B) = 1.18 - 0.89

P(A ∩ B) = 0.29

So, 29% of the group have been to both Canada and France.

38 + 80 - x = 118 - x

But we know that 11% have been to neither country, which means that:

100 - 11 = 89 people have been to at least one of the countries.

Therefore, 118 - x = 89x = 29

So, 29 people have been to both Canada and France.
Therefore, the percentage of the group that have been to Canada and France is:

29%

List all the permutations of four objects m, I, n, and k taken two at a time without repetition. What is P? List all the permutations of four objects m, I, n, and k taken two at a time without repetition. Choose the correct answer below. O A. m, mn, mk, In, lk, nk OB. ml, mn, mk, Im, in, lk, nm, nl, nk, km, kl, kn OC. m. I, n,k OD. mm, ml, mn, mk, II, In, lk, nn, nk, kk What is P2?

Answers

The permutations of four objects m, I, n, and k taken two at a time without repetition are: mn, mk, mi, nm, nk, ni, km, kn, ki, in, im, ik.

P is the total number of permutations, which is equal to 12.

The correct answer is OB, which lists all 12 permutations.

P2 is the number of permutations taken two at a time with repetition allowed. This means that we can repeat the same object in a permutation.

There are 16 possible permutations with repetition allowed: mm, ml, mn, mk, ll, ln, lk, nn, nk, kk, ii, ik, nn, ni, nk.

Therefore, P2 is equal to 16.

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Some one help me I don’t get this

Answers

Answer:

Isosceles

Step-by-step explanation:

Pre-Solving

We are given a triangle. We know that the angles have a measure of 45°, 45°, and 90°.

We also know that the sides of the triangle are 3.2, 3.2, and 4.5 units.

We want to classify this triangle.

Solving

A scalene triangle has all of its sides and angles as different values.

An isosceles triangle has 2 of its sides as the same value, and 2 of its angles as the same value.

An equilateral triangle has all of its sides as the same value, and all of its angles as the same value.

Looking at the side lengths and angle values we are given, we can see that we have 2 angles that are the same value (45°), and 2 sides that are the same value (3.2 units).

Therefore, we have an isosceles triangle.

a building 51 feet tall casts a shadow 48 feet long. simultaneously, a nearby statue casts a shadow of 16 feet. how tall is the statue?

Answers

We can use the concept of similar triangles. Since the building and the statue are casting shadows simultaneously, the angle of elevation of the sun is the same for both. Therefore, the triangles formed by the building, its shadow, and the ground and the statue, its shadow, and the ground are similar triangles.

Let's use the given information:
- Building height = 51 feet
- Building shadow length = 48 feet
- Statue shadow length = 16 feet
- Statue height = x (this is what we need to find)

Now, set up a proportion using the ratios of the corresponding sides of the similar triangles:

(Building height / Building shadow length) = (Statue height / Statue shadow length)

(51 / 48) = (x / 16)

To find the statue height (x), cross-multiply and solve for x:

51 * 16 = 48 * x

816 = 48x

Now, divide by 48 to find the value of x:

x = 816 / 48
x = 17

So, the statue is 17 feet tall.

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Find the missing side length, n.
R
B
4
А
8
C
9
Q
n = [?]
n
S

Answers

Answer:

Without additional context or information, it's difficult to determine the missing side length with certainty. However, we can use some logical reasoning to make an educated guess.

One possible way to approach this problem is to look for relationships between the known side lengths and the missing side length. For example, we can look at the lengths of the sides that are adjacent to the missing side and see if there are any patterns or ratios that might help us determine the length of the missing side.

In this case, we can see that the missing side is adjacent to sides with lengths of 8 and 9, which have a difference of 1. If we assume that the sides of the figure form a regular pattern or sequence, then we might guess that the missing side has a length that is 1 greater than 9, which would give us a length of 10 for the missing side.

However, this is just a guess based on the limited information provided, and there could be other possible solutions depending on the specific properties or context of the figure.

what information can be obtained from a two way anova that cannot be obtained from two one way designs using the same variables?

Answers

A two-way ANOVA allows for the examination of the interaction effect between two independent variables on a dependent variable, while two one-way designs only allow for the examination of the main effects of each independent variable separately.

In other words, a two-way ANOVA provides information on how the effect of one independent variable on the dependent variable changes depending on the level of the other independent variable. This interaction effect cannot be obtained from two separate one-way designs.

Additionally, a two-way ANOVA allows for the examination of the overall variance explained by both independent variables and their interaction, which cannot be examined in two separate one-way designs.

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