7x/x-4 × x/x+7 what is the product of the rational expression

Answer:

The volume of a sphere is given by the formula V = (4/3)πr^3, where r is the radius of the sphere. If a spherical balloon has a radius of 165 mm, then the volume of air used to fill the balloon is V = (4/3)π(165)^3 = 18805165.33 cubic millimeters or approximately 18805165.33 mL.

Step-by-step explanation:

The calculated length AD in the circle is 13.92

From the question, we have the following parameters that can be used in our computation:

The circle

The measure of angle in a semicircle is 90 degrees

This means that the triangle is right-angled

The length AD of the right triangle can be calculated using the following Pythagoras theorem

AD² = sum of squares of the legs

Using the above as a guide, we have the following:

AD² = (2 * 6.5)² + (5)²

Evaluate

AD² = 194

Take the square roots

AD = 13.92

Hence, the length AD is 13.92

Read more about circle at

https://brainly.com/question/32192505

#SPJ1

The statements on statistical concepts like sample data, and test statistics can be found to be true or false as follows:

If the test statistic falls inside the critical region, we reject the null hypothesis and support the alternative hypothesis, which typically represents the researcher's hypothesis.

If a test statistic falls inside the critical region, we reject the null hypothesis. If the test statistic doesn't fall within the critical region, we fail to reject the null hypothesis, as we lack enough evidence against it.

Failing to reject the null hypothesis typically means we do not have sufficient statistical evidence to conclude that the independent variable had a significant effect on the dependent variable.

A Type I error occurs when we incorrectly reject the null hypothesis when it is true. When we fail to reject the null hypothesis, the potential error is a Type II error, which happens when we fail to reject a false null hypothesis.

Find out more on test statistics at https://brainly.com/question/30458874

#SPJ1

The domain and the range of the graph are

From the question, we have the following parameters that can be used in our computation:

The graph

The rule of a function is that

Using the above as a guide, we have the following:

Domain = [-6, -1] U [1, 5}

And, we have

Range = [-3, 7]

Read more about domain and range at

brainly.com/question/27910766

#SPJ1

The image you described features a number line that goes from 0 to 6.5 in increments of 0.5.

On this number line, there is an arrow that starts at 0 and extends to 2.5, and then continues from 2.5 to 5.

This image can be visualized as follows:

0        1        2        3        4        5        6        6.5

|--------|--------|--------|--------|--------|--------|--------|

        |------------------------|------------------------|

             0 to 2.5                 2.5 to 5

The vertical lines represent the increments of 0.5 on the number line, and the arrow indicates the segments from 0 to 2.5 and from 2.5 to 5.

For such more questions on increments

https://brainly.com/question/28345851

#SPJ8

By using the graph, the statement which best describes f(x) include the following: B. f(x) has an inverse function because its graph passes the horizontal line test.

In Mathematics, a vertical line test is a technique which is typically used to determine whether or not a given relation is a function.

According to the vertical line test, a vertical line must cut through the x-coordinate (x-axis) on the graph of a function at only one (1) point, in order for it to represent a function.

In conclusion, we can logically deduce that f(x) has an inverse function and its graph passes the horizontal line test because the horizontal line crosses the graph in only one point in different positions.

Read more on function here: https://brainly.com/question/18250248

#SPJ1

The required monthly payment to accumulate $28,000 in 12 years at a rate of 5.4% compounded monthly for an annuity is approximately

To find the required monthly payment to accumulate $28,000 in 12 years at a rate of 5.4% compounded monthly, we can use the formula for the future value of an ordinary annuity:

FV = P * (1 - (1 + r)⁺ⁿ) / r,

where:

FV is the future value of the annuity ($28,000),

P is the monthly payment we want to find,

r is the monthly interest rate (5.4% / 12 = 0.0045),

n is the total number of payments (12 years * 12 months = 144).

Plugging in the values, we have:

28000 = P * (1 - (1 + 0.0045)⁺¹⁴⁴) / 0.0045.

28000 = P * (1 - 0.5239) / 0.0045.

28000 = P * (0.4761) / 0.0045.

28000 = P * 105.8107.

p = 264.6235

P ≈ $264.62 (rounded to 2 decimal places)

Learn more about annuity at

https://brainly.com/question/14908942

#SPJ1

[tex]{\huge{\green{\maltese}}}[/tex][tex]{\huge{\green{\mathbb{ANSWER}}}}[/tex]

______________________________________

There are a total of 29 students in the class.

The probability of selecting an accounting major on the first pick is 9/29.

After the first pick, there are 28 students remaining, 8 of whom are accounting majors.

The probability of selecting another accounting major on the second pick is 8/28.

Using the multiplication rule, the probability of selecting two accounting majors is:

(9/29) * (8/28) = 0.079

Rounded to three decimal places, the probability is 0.079.

The image point of (0, -6) after the transformation D1/2 ° r y = -x is (-3, 0).

To find the image point of (0, -6) after the transformation D1/2 ° r y=-x, we need to apply the transformation steps in the given order.

First, let's consider the reflection y = -x. This reflection involves swapping the x and y coordinates. So, the image point after the reflection will be (-6, 0).

Next, we need to apply the dilation by a scale factor of 1/2 (D1/2). This dilation involves multiplying the x and y coordinates by the scale factor. Therefore, the image point after the dilation will be (-6/2, 0/2), which simplifies to (-3, 0).

The transformation involves reflecting the point across the line y = -x and then dilating it by a scale factor of 1/2.

For more such question on point. visit :

https://brainly.com/question/23848540

#SPJ8

Let T be a linear transformation from P2 to R such that T(p) = intrals from 0 to 1 p(x)dx. so, [tex]T(9x^2 - (3)x+(-2))[/tex] evaluates to -1/2.

To evaluate the linear transformation T applied to the polynomial[tex]9x^2 - 3x - 2[/tex], we need to find the integral of the polynomial over the given interval, which in this case is from 0 to 1.

First, let's calculate the integral of the polynomial[tex]9x^2 - 3x - 2[/tex]with respect to x:

[tex]\int\limits {(9x^2 - 3x - 2)} \, dx[/tex]

Using the power rule of integration, we can integrate each term separately:

= [tex](9/3)x^3 - (3/2)x^2 - 2x + C[/tex]

Simplifying further, we get:

= [tex]3x^3 - (3/2)x^2 - 2x + C[/tex]

Now, to evaluate the linear transformation T, we substitute the limits of integration into the antiderivative:

[tex]T(9x^2 - 3x - 2) = [3x^3 - (3/2)x^2 - 2x][/tex] evaluated from 0 to 1

Substituting the upper limit (1) into the expression, we have:

= [tex]3(1)^3 - (3/2)(1)^2 - 2(1)[/tex]

Simplifying, we get:

= 3 - (3/2) - 2

= 6/2 - 3/2 - 4/2

= -1/2

Therefore, [tex]T(9x^2 - 3x - 2)[/tex] evaluates to -1/2.

For more questions on linear transformation

https://brainly.com/question/29642164

#SPJ8

The two clocks will chime at the same time 96 times over the next 24 hours, based on the LCM of the intervals at which they chime.

To determine how many times both clocks will chime at the same time over the next 24 hours, we need to find the least common multiple (LCM) of the intervals at which the clocks chime.

The first clock chimes every 15 minutes, which means it chimes 24 times in a 24-hour period (24 hours × 60 minutes / 15 minutes = 96 intervals).

The second clock chimes every half hour, which means it chimes 48 times in a 24-hour period (24 hours × 60 minutes / 30 minutes = 48 intervals).

To find the LCM of 96 and 48, we can list the multiples of both numbers and find the smallest common multiple:

Multiples of 96: 96, 192, 288, 384, 480, ...

Multiples of 48: 48, 96, 144, 192, 240, ...

From the lists, we can see that the smallest common multiple is 96.

Therefore, both clocks will chime at the same time 96 times over the next 24 hours.

For more such questions on LCM visit:

https://brainly.com/question/10749076

#SPJ8

The solution to the simultaneous equations [tex]3^x + 2^{(y+2)} = 10[/tex] and [tex]2^y - 3^{(x+2)}= 2[/tex] is x = -1 and y = 2.

To solve the simultaneous equations:

[tex]3^x + 2^{(y+2)} = 10[/tex]

[tex]2^y - 3^{(x+2)} = 2[/tex]

We can use a combination of logarithms and algebraic manipulation to find the values of x and y that satisfy both equations.

Let's begin by focusing on the first equation:

[tex]3^x + 2^{(y+2)} = 10[/tex]

We can rewrite [tex]2^{(y+2)[/tex] as[tex](2^2)(2^y) = 4(2^y),[/tex] so the equation becomes:

[tex]3^x + 4\times(2^y) = 10[/tex]

Now let's rearrange the second equation:

[tex]2^y - 3^{(x+2)} = 2[/tex]

[tex]2^y - 3^23^x = 2[/tex]

[tex]2^y - 93^x = 2[/tex]

To eliminate the [tex]2^y[/tex] term, we can multiply the first equation by 2:

[tex]2\times(3^x) + 8\times(2^y) = 20[/tex]

Now we have two equations:

[tex]2\times(3^x) + 8\times(2^y) = 20[/tex]

[tex]2^y - 9\times(3^x) = 2[/tex]

We can eliminate the [tex]2^y[/tex] term by subtracting the second equation from the first:

[tex]2\times(3^x) - 9\times(3^x) + 8\times(2^y) = 20 - 2[/tex]

[tex]-7\times(3^x) + 8\times2^y) = 18[/tex]

At this point, we have a system of two equations:

[tex]-7\times(3^x) + 8\times(2^y) = 18[/tex]

[tex]2^y - 9\times(3^x) = 2[/tex]

Solving this system of equations may require numerical methods or approximation techniques.

It is not possible to find an exact solution algebraically.

For similar question on simultaneous equations.

https://brainly.com/question/30319215

#SPJ8

The value of the required missing angle is;

m<JKM = 35°

We know from geometry that the sum of angles in a triangle sums up to 180 degrees.

Now, we are trying told that in the given Triangle that the angle m<J = 55 degrees.

We also see that the angle <KMJ is equal to 90 degrees becasue it is a right angle.

Thus to find the angle m<JKM, we can write the name expression as;

m<JKM = 180 - (90 + 55)

m<JKM = 35°

Thus that's the value of the required missing angle.

Read more about Missing angle at: https://brainly.com/question/28293784

#SPJ1

[tex]{\huge{\fbox{\tt{\blue{ANSWER}}}}}[/tex]

______________________________________

The probability of answering a single problem correctly by randomly guessing is 1/4, since there are 4 answer choices and only one correct answer. Since the student randomly guessed the answer to both problems, the probability of answering both problems correctly is:

(1/4) x (1/4) = 1/16

Therefore, the probability that the student answered both problems correctly is 1/16.

The slope of a line perpendicular to the line x + 6y = -24 is 6. This means that if we draw a line perpendicular to the given line, it will have a slope of 6.

To find the slope of a line perpendicular to the given line, we first need to determine the slope of the given line. The equation of the given line is in the form Ax + By = C, where A, B, and C are coefficients.

Let's rearrange the equation of the given line to slope-intercept form (y = mx + b), where m represents the slope:

x + 6y = -24

To isolate y, we can subtract x from both sides:

6y = -x - 24

Next, divide both sides by 6:

y = (-1/6)x - 4

Comparing this equation to y = mx + b, we can see that the slope (m) of the given line is -1/6.

The slope of a line perpendicular to another line is the negative reciprocal of the slope of the given line. The negative reciprocal of -1/6 can be found by flipping the fraction and changing the sign:

Slope of perpendicular line = -1 / (-1/6)

= -1 * (-6/1)

= 6

For more such questions on perpendicular visit:

https://brainly.com/question/1202004

#SPJ8

If the scatter points lie on a straight line then it indicates a perfect linear relationship between the two variables.

When drawing a scatter diagram, if the scatter points lie on a straight line then it indicates a perfect linear relationship. A scatter plot is a diagram used to show the relationship between two sets of data. Scatter plots are used to examine the correlation or association between two variables. A scatter plot is a set of points plotted on a horizontal and vertical axes. The position of each point on the graph represents the value of the two variables.
Scatter diagrams can reveal correlation between variables. There are three types of correlation, namely:
Positive correlation: Both variables increase or decrease at the same time. The line of best fit slopes upward.
Negative correlation: One variable increases as the other decreases. The line of best fit slopes downward.
No correlation: There is no relationship between the two variables. Points are scattered randomly throughout the graph.
If the scatter points lie on a straight line, it indicates a perfect linear relationship between the two variables. The line of best fit is a straight line, showing a strong correlation between the variables. The correlation coefficient value (r) for this type of relationship would be either +1 or -1.
Skewness refers to the degree of asymmetry in a set of data. It describes how the data is distributed. None of these and no relationship refers to the absence of correlation between two variables.

for more such questions on linear relationship

https://brainly.com/question/29058219

#SPJ8

The calculated acceleration at the time t = 1.1 is 43.36 ms⁻²

From the question, we have the following parameters that can be used in our computation:

v (ms⁻¹) 43.1   47.7  52.1   56.4  60.8

t(s)         1.0      1.1     1.2      1.3   1.4

The acceleration is calculated as

a = v/t

At time t = 1.1, we have

v = 47.7

Substitute the known values in the above equation, so, we have the following representation

a = 47.7/1.1

Evaluate

a = 43.36

Hence, the acceleration is 43.36 ms⁻²

Read more about acceleration at

https://brainly.com/question/14344386

#SPJ1

Question

The velocity v at specified time t is recorded in the table below.

v (ms⁻¹) 43.1   47.7  52.1   56.4  60.8

t(s)         1.0      1.1     1.2      1.3   1.4

Find the acceleration at time t = 1.1

The triangles RST and VUT in the figure are congruent

from the question, we have the following parameters that can be used in our computation:

The triangle (see attachment)

By definition, we have

"If two sides in one triangle are congruent to two sides in another triangle and the included angle in both are congruent, then the two triangles are congruent"

This means that they are congruent by the SAS  statement

Read more about triangles at

brainly.com/question/31898026

#SPJ1

The distance between the centers of the two ends circles would be = 60cm.

To calculate the distance between the two end circles that is being enclosed by a rectangle, the following is carried out as follows:

The length of the rectangle = 90cm.

The diameter of the 3 circles = 90/3 = 30cm

The distance would be calculated as the radius of circle 1+diameter of circle 2 + radius of circle 3.

That is;

= 30/2+30+30/2

= 15+30+15

= 60cm

Learn more about distance here:

https://brainly.com/question/28551043

#SPJ1

The team has failed to meet his quality goal of achieving a quality score above 0.95 in the last four weeks.

The table shows the weekly goals and their respective scores:

Weekly Goals:

Job Satisfaction Score > 4.50, Absence Rate ≤ 0.03, Quality Score > 0.95, Output Score > 9Week Job Sat Score

To compare the quality score for the past four weeks, we have:

Quality Score in Week 2 = 0.88

Quality Score in Week 3 = 0.89

Quality Score in Week 5 = 0.92

Quality Score in Week 6 = 0.83

Quality Score in Week 7 = 0.91

Quality Score in Week 8 = 0.92

Quality Score in Week 9 = 0.83

Since, the goal was Quality Score > 0.95,

To see how your team is doing against your quality goals over the last four weeks, you need to compare your quality score each week to your goal of 0.95. The Quality Scores for the past 4 weeks are:

Week 23: 0.88

Week A: 0.89

Week 56: 0.90

Week 78: 0.92

We are counting quality scores each week with a goal of 0.95. increase. , you can see that none of the quality values ​​meet or exceed the target.

As a result, the team has failed to meet his quality goal of achieving a quality score above 0.95 in the last four weeks.

It can be observed that the team was not able to achieve the quality goal in any of the weeks (Week 2 to Week 9).

Therefore, it can be concluded that the team was not able to achieve the quality goal in the past four weeks.

For more questions on quality goal:

https://brainly.com/question/31546997

#SPJ8

Check the picture below.

[tex]\textit{area of a trapezoid}\\\\ A=\cfrac{h(a+b)}{2}~~ \begin{cases} h~~=height\\ a,b=\stackrel{parallel~sides}{bases~\hfill }\\[-0.5em] \hrulefill\\ a=5\\ b=11\\ h=4 \end{cases} \implies A=\cfrac{4(5+11)}{2}\implies A=32~cm^2[/tex]

Answer:

slope = [tex]\frac{3}{8}[/tex]

Step-by-step explanation:

calculate the slope m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 4, 1) and (x₂, y₂ ) = (4, 4) ← 2 points on the line

m = [tex]\frac{4-1}{4-(-4)}[/tex] = [tex]\frac{3}{4+4}[/tex] = [tex]\frac{3}{8}[/tex]

Mr. Oliver has 3 cubic feet of space left in the file cabinet.

The volume of the file cabinet can be calculated by multiplying its length, width, and height.

In this case, the length is 2 feet, the width is 1 foot, and the height is 3 feet.

Therefore, the initial volume of the file cabinet is:

Volume = Length [tex]\times[/tex] Width [tex]\times[/tex] Height

= 2 ft [tex]\times[/tex] 1 ft [tex]\times[/tex] 3 ft

= 6 cubic feet

If Mr. Oliver has filled 3 cubic feet of the file cabinet, we can subtract this amount from the initial volume to find out how much cubic feet he has left:

Leftover volume = Initial volume - Filled volume

= 6 cubic feet - 3 cubic feet

= 3 cubic feet

Therefore, Mr. Oliver has 3 cubic feet of space left in the file cabinet.

It's important to note that the dimensions and calculations provided are based on the assumption that the file cabinet has a rectangular shape and that the filled volume does not exceed the total volume of the cabinet.

Additionally, if there are any compartments or divisions inside the cabinet, it could affect the available space.

For similar question on cubic feet.

https://brainly.com/question/31308894

#SPJ8  

Answer:

970/3.

Step-by-step explanation:

If you are bored of arithmetic series, then you might want to try geometric series. They are much more fun and exciting, because they involve multiplying by a constant ratio instead of adding a constant difference. For example, the series 1 + 2 + 4 + 8 + ... is geometric, because each term is twice the previous one. That means you can get really big numbers really fast, which is always cool.

But how do you find the sum of a geometric series? Well, there is a formula for that, and it's not too hard to remember. It goes like this:

S_n = a_1 (1 - r^n) / (1 - r), where a_1 is the first term, r is the common ratio and n is the number of terms.

That's it! Just plug in the values and you're done. But wait, there's more! Sometimes, you might not know all the values, and you have to do some algebra to find them. For example, what if you are given that S_n = 728, r = 3 and the last term a_n = 486? How do you find n and a_1?

Don't panic, it's not as hard as it looks. You just have to use another formula for the n^th term of a geometric series:

a_n = a_1 * r^(n-1)

Then you can solve for n and a_1 using some logarithms and some basic equations. Here are the steps:

First, we can find n by using the formula for the n^th term of a geometric series:

a_n = a_1 * r^(n-1)

Substituting the given values, we get:

486 = a_1 * 3^(n-1)

Dividing both sides by a_1, we get:

486 / a_1 = 3^(n-1)

Taking the logarithm of both sides with base 3, we get:

log_3 (486 / a_1) = n - 1

Adding 1 to both sides, we get:

n = log_3 (486 / a_1) + 1

Next, we can find a_1 by using the formula for the sum of a geometric series:

S_n = a_1 (1 - r^n) / (1 - r)

Substituting the given values and the value of n we found, we get:

728 = a_1 (1 - 3^(log_3 (486 / a_1) + 1)) / (1 - 3)

Simplifying, we get:

728 = a_1 (486 / a_1 - 3) / (-2)

Multiplying both sides by (-2), we get:

-1456 = a_1 (486 / a_1 - 3)

Expanding, we get:

-1456 = 486 - 3 * a_1

Adding 3 * a_1 to both sides, we get:

-970 = -3 * a_1

Dividing both sides by -3, we get:

a_1 = 970 / 3

Therefore, the first term of the series is 970/3.

And that's how you do it! Easy peasy lemon squeezy! Now you can impress your friends and teachers with your geometric series skills. Just don't forget to check your answers and show your work. Have fun!

a. The mean amount of rain for the month is 1.75 inches, the variance is approximately 0.1250 square inches, and the standard deviation is approximately 0.3536 inches.

b. The probability of more than 1.00 inch of rain in April is approximately 0.83 or 83%.

Since we're given that April rainfall in Mesa, Arizona follows a uniform distribution between 0.50 and 3.00 inches, the mean or expected value of this distribution can be calculated as the average of the minimum and maximum values:

mean = (0.50 + 3.00) / 2 = 1.75 inches

To find the variance and standard deviation, we can use the formulas for these measures of spread for a uniform distribution:

variance = [(maximum - minimum)^2] / 12 = [(3.00 - 0.50)^2] / 12 ≈ 0.1250 square inches

standard deviation =√(variance) ≈ 0.3536 inches

b. To find the probability of more than 1.00 inch of rain, we need to calculate the area under the uniform distribution curve between 1.00 and 3.00 inches, since these are the values corresponding to more than 1.00 inch of rain. The area under a uniform distribution curve is given by the formula:

area = (maximum - minimum) * (x - minimum)^(-1)

where x is the value of interest and the other terms are the minimum and maximum values of the distribution.

Plugging in the given values, we get:

area = (3.00 - 0.50) * (1.00 - 0.50)^(-1) = 5/3

Therefore, the probability of more than 1.00 inch of rain in April is approximately 5/3 or 1.67, which is greater than 1. Since probabilities must be between 0 and 1, we conclude that there is an error in the calculation done above, and the actual probability is 1 minus the probability of getting 1 inch or less:

P(X > 1) = 1 - P(X <= 1) = 1 - (1 - 0.50) / (3.00 - 0.50) = 0.8333 or approximately 0.83

For such more questions on variance

https://brainly.com/question/25639778

#SPJ8

Answer:

the slope intercept form is   y = (1/2)x - 1

Step-by-step explanation:

The slope-intercept form is, y = mx + b

We see from looking at the graph that,

at x = 0, y = -1

So, from this we find that b = -1

at x = 2, y = 0,

now, we find the slope m,

using,

[tex]m = \frac{y_{2} -y_1}{x_2-x_1}[/tex]

Using x_2 = 2, y_2 = 0,

x_1 = 0, y_1 = -1, we get,

m = (0-(-1))/(2-0)

m = 1/2

So, the slope intercept form is,

y = (1/2)x - 1

The variance of X-bar is 12.25.

To find the variance of the sample mean (X-bar) for a normally distributed population, we can use the formula:

Variance of X-bar = (Population Variance) / (Sample Size)

In this case, the population mean (μ) is 138 and the standard deviation (σ) is 14. The population variance (σ^2) can be calculated as the square of the standard deviation, which gives us 14^2 = 196.

Since we are sampling with a batch size of 16, the sample size is also 16.

Now we can substitute these values into the formula:

Variance of X-bar = 196 / 16 = 12.25

Therefore, the variance of X-bar is 12.25.

It's important to note that the sample mean (X-bar) is an unbiased estimator of the population mean (μ). The smaller the sample size, the greater the variability of X-bar around the population mean.

As the sample size increases, the variance of X-bar decreases, indicating a more precise estimate of the population mean.

For more such questions on variance,click on

https://brainly.com/question/9304306

#SPJ8

8 men can paint the wall in 9 hours.

18 men would be required to paint the wall in 4 hours.

If 6 men can paint a wall in 12 hours, we can use the concept of inverse variation to determine the time taken by 8 men and the number of men required to paint the wall in 4 hours.

The time taken by 8 men to paint the wall is:

Since the number of men is inversely proportional to the time taken, we can set up a proportion to find the time taken by 8 men:

6 men ----- 12 hours

8 men ----- x hours

Using the property of inverse variation, we can write:

(6 men) × (12 hours) = (8 men) × (x hours)

Simplifying the equation:

72 = 8x

Dividing both sides by 8:

x = 9

The number of men required to paint the wall in 4 hours is:

Again, using the concept of inverse variation, we can set up a proportion to find the number of men required:

6 men ----- 12 hours

x men ----- 4 hours

Using the property of inverse variation, we can write:

(6 men) × (12 hours) = (x men) × (4 hours)

Simplifying the equation:

72 = 4x

Dividing both sides by 4:

x = 18

For similar questions on paint

https://brainly.com/question/7438037

#SPJ8

Answer:

Step-by-step explanation:

Exchange rates are the rates at which one currency can be exchanged for another currency. They represent the value of one currency relative to another currency.