1) The eighth grade class has 20% fewer students this year than they
had as seventh graders. Write an expression to show the decline in
class numbers, and then simplify the expression. Use (s) to represent
the number of seventh grade students.

Answer:

$448.25

Step-by-step explanation:

For her medical expenses, it has to be more than 7.5% of her gross income of $32,500 => 7.5% of $32,500 = $2437.5.

so her deduction for medical expenses is $19,500 - $2437.50 = $17,062.5

so her total itemized deduction is $6,320.00 + $17,062.50 = $23,382.50

Given Kristina will file a single so her standard deduction for 2022 is $12,950.

If she uses standard deduction, her taxable income is 32,500 - 19,500 = 13,000

For the first 10,000 taxed at 10% so it is 10,000 x 10% = $1,000

The next $3000 taxed at 12% = $360

Her total tax is $1,000 + $360 = $1,360

If she uses itemized deduction, her taxable income is 32,500 - 23,382.50 = 9117.5

For the first 10,000 taxed at 10% so it is 9117.5 x 10% = $911.75

The tax saved is $1,360 - $911.75 = $448.25

Hope this helps.

Answer:

3. Initial cost = 99 dollars.  Each hour (h) is 19 dollars. The total value will be initial cost + hours*(cost per hour)=> t=99+19h.

4. She will be using the car for 3 days. Each day costs 29.99. There is no initial cost, so her total cost will be 29.99*3=89.97 dollars.

Substitute the expression for y in the second equation into the first equation and solve for x:

4x + 3(-1/3x + 6) = 36

4x - x + 18 = 36

3x = 18

x = 6

Now substitute x = 6 into the second equation to solve for y:

y = (-1/3)(6) + 6

y = 4

Therefore, the solution to the system of equations is the ordered pair (6, 4).

Answer:

there were 15 almonds in the snack pack.

Step-by-step explanation:

Let's use variables to represent the unknown quantities. Let's call the number of almonds in the snack pack "a", and the number of cashews in the snack pack "c".

we can use the following equations to represent the problem:

c = 2a (the number of cashews is twice the number of almonds)

c - 10 = a + 5 (there are 5 more cashews than almonds after Sylvia eats 10 cashews)

Substituting the first equation into the second equation, we get:

2a - 10 = a + 5

Solving for "a", we get:

a = 15

So there were 15 almonds in the snack pack.

The correct statements are -

In statistics, an outlier is a data point that differs significantly from other observations. An outlier may be due to a variability in the measurement, an indication of novel data, or it may be the result of experimental error; the latter are sometimes excluded from the data set.

Given is to identify which of the following statements is most accurate with respect to outliers in this example.

The correct statements are -

Therefore, the correct statements are -

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The degree measure of [tex]$\angle sap$ is $726^\circ - 4 \times \angle sop$.[/tex]

Angel is a geometric figure that can be described as the amount of rotation between two straight line or planes and angles is measured in degree with the full circle being 360°.

We can use the following formula to calculate the degree measure of $\angle sap$:

[tex]$\angle sap = 4 \times \angle sop - 174^\circ$[/tex]

Therefore, [tex]$\angle sap = 4 \times \angle sop - 174^\circ = 4 \times (180^\circ - \angle sop) - 174^\circ = 726^\circ - 4 \times \angle sop$[/tex]

Therefore, the degree measure of  [tex]$\angle sap$ is $726^\circ - 4 \times \angle sop$.[/tex]

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Answer:

it depends on how many students?

Step-by-step explanation:

The digits are arranged in increasing order from left to right, and that each digit is used exactly once.

What is a number line?

A number line is a visual representation of numbers arranged in a straight line from left to right or from right to left. It is a tool commonly used in mathematics to help visualize numerical relationships, such as addition, subtraction, multiplication, and division.

A typical number line starts at zero in the middle and extends infinitely in both directions, with positive numbers increasing to the right and negative numbers decreasing to the left. The distance between any two points on the number line represents the absolute difference between the corresponding numbers.

Here's a number line using the digits 0-9 exactly once:

-9 --- -8 --- -7 --- -6 --- -5 --- -4 --- -3 --- -2 --- -1 --- 0 --- 1 --- 2 --- 3 --- 4 --- 5 --- 6 --- 7 --- 8 --- 9

Note that the digits are arranged in increasing order from left to right, and that each digit is used exactly once.

Therefore, the digits are arranged in increasing order from left to right, and that each digit is used exactly once.

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The fraction of the teams which walked as part of the fundraiser for the library, that raised extra money, is D. 1 / 3.

You must count the number of teams that were able to walk more than 50 laps in order to determine the percentage of teams that raised the additional funds. The distance walked by teams more than 50 laps were :

There are 12 teams overall, which is equal to the number of leaves.

The fraction of teams that raised additional funds is:

= 4 teams / 12 total teams

= ( 4 ÷ 4 ) / ( 12 ÷ 4 )

= 1 / 3

In conclusion, the fraction of teams which raised extra money was 1 / 3.

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Intersection points for the lines are,

⇒ (3, 5) (1, 7) and (1, 5)

Line segment is the part of line which have two endpoint and bounded by two distinct end points and it contain every point on the line which is between its endpoint.

Given that;

The equation of lines are,

x + y = 8  .. (i)

y = 5 .. (ii)

x = 1  .. (iii)

Now, Intersect point for equation (i) and (ii);

x + y = 8  .. (i)

y = 5 .. (ii)

⇒ x + 5 = 8

⇒ x = 3

Hence, The intersection point = (3, 5)

And, Intersect point for equation (i) and (iii);

x + y = 8  .. (i)

x = 1  .. (iii)

⇒ x + y = 8

⇒ y = 8 - 1

⇒ y = 7

Hence, The intersection point = (1, 7)

And, Intersect point for equation (ii) and (iii);

⇒ (1, 5)

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Answer:

C

The value of the variables in answer C satisfies both of the equations

The domain are the possible input while the range are the possible output of a function.

(a) The domain = [-√2, √2], the range = [0, 2]

(b) The domain = [-1, 1], the range = [0, 1]

(c) The domain = [-1, 1], the range = [0, -1]

(d) The domain = [0, 2], the range = [0, 1]

(e) The domain = [-(2 + √2), (√2 - 2)], the range = [0, 2]

Reasons:

The given functions can be expressed by the equation; (-x + 1)·(x + 1) = -x² + 1

Therefore, we have;

(a) y = f(x) + 1 = -x² + 1 + 1 = -x² + 2

The x-intercept of the above function are, x = √2, and x = -√2

Which gives;

The domain = [-√2, √2]

The range = [0, 2]

(b) y = 3·f(x) = 3 × (-x² + 1) = -3·x² + 3

At the x–intercepts, we have;

-3·x² + 3 = 0

x = ±1

The domain = [-1, 1]

The maximum value of y is given at x = 0, therefore;

= -3 × 0² + 3 = 3

The range = [0, 1]

(c) y = -f(x) = -(-x² + 1) = x² - 1

At the x–intercepts, x² - 1 = 0

x = ± 1

The domain = [-1, 1]

The minimum value of y is given at x = 0, which is y = -1

The range = [0, -1]

(d) y = f(x - 1) = -(x - 1)² + 1 = -x² + 2·x

At the x–intercepts, we have;  -x² + 2·x = 0, which gives;

(-x + 2)·x = 0

Which gives, x = 0, or x = 2

The domain = [0, 2]

The maximum value of y is given when x = -b/(2·a) = -2/(2×(-1)) = 1

y = f(1) =  -1² + 2×1 = 1

Therefore;

The range = [0, 1]

(e) y = f(x + 2) + 1 = (-(x + 2)² + 1) + 1 = -x² - 4·x - 2

At the x–intercepts, we have;  -x² - 4·x - 2 = 0, which gives;

x = -(2 + √2) or x = x = √2 - 2

The domain = [-(2 + √2), (√2 - 2)]

The maximum value of y is given when x = -4/(2)) = -2

Which gives;

-(-2)² - 4·(-2) - 2 = 2

The range = [0, 2]

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Answer:

68.1 square units

Step-by-step explanation:

l = Length of rectangle

 = 9 units

w = Width of rectangle

   = 6 units

The dashed lines represent the diameter of the circle. Semi-circle is exact half of a circle. This diameter is parallel to the width of the rectangle and is equal in measurement:

r = Radius of semi-circle

 = [tex]\frac{Diameter}{2}[/tex]

 = [tex]\frac{6}{2}[/tex] units

 = 3 units

∴Area of composite solid = Area of rectangle + Area of semi-circle

                                           = [(l × w) + [tex]\frac{1}{2}(\pi r^{2})[/tex]] [tex]units^{2}[/tex]

                                          = {[9 × 6] + [tex]\frac{1}{2}[\pi (3)^{2}][/tex]} [tex]units^{2}[/tex]

                                          = [54 + [tex]\frac{9}{2}\pi[/tex]] [tex]units^{2}[/tex]

                                          = 68.137 [tex]units^{2}[/tex]

                                         = 68.1 square units (Rounded to the nearest tenths place)

The rock has an instantaneous velocity of 16 meters per second.

In this problem we need to determine the average velocity of the rock, represented by a secant line, and estimate its instantaneous velocity, represented by a tangent line. The average speed is defined by the following expression:

u = [y(t + Δt) - y(t)] / Δt

Where:

The instantaneous speed is the average speed when Δt ⇒ 0.

Part A

Case I

y(1) = 20 · 1 - 1.87 · 1²

y(1) = 20 - 1.87

y(1) = 18.13 m

y(2) = 20 · 2 - 1.87 · 2²

y(2) = 40 - 7.48

y(2) = 32.52 m

u = (32.52 m - 18.13 m) / 1 s

u = 14.39 m / s

Case II

y(1.1) = 20 · 1.1 - 1.87 · 1.1²

y(1.1) = 19.737 m

u = (19.737 m - 18.13 m) / 0.1 s

u = 16.07 m / s

Case III

y(1.01) = 20 · 1.01 - 1.87 · 1.01²

y(1.01) = 18.292 m

u = (18.292 m - 18.13 m) / 0.01 s

u = 16.2 m / s

Case IV

y(1.001) = 20 · 1.001 - 1.87 · 1.001²

y(1.001) = 18.146 m

u = (18.146 m - 18.13 m) / 0.001 s

u = 16 m / s

And the instantaneous velocity of the rock is approximately 16 meters per second.

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Answer:

A right triangle is a type of triangle that has one angle measuring 90 degrees and two acute angles. It has a hypotenuse and two legs, and it is the only type of triangle that the Pythagorean theorem can be applied to. There are different types of right triangles, including isosceles right triangles, 45-45-90 triangles, and 30-60-90 triangles, each with its own unique properties.

Step-by-step explanation:

A right triangle is a type of triangle that has one angle which measures exactly 90 degrees, which we call the right angle. The other two angles are called acute angles and they are always less than 90 degrees.

A right triangle has a special property: the side opposite the right angle is called the hypotenuse. This is the longest side of the triangle and it is always opposite to the right angle. The other two sides are called legs.

One important thing to note is that the Pythagorean theorem only works for right triangles. This theorem tells us that the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs. This formula is often written as a^2 + b^2 = c^2, where a and b are the lengths of the legs and c is the length of the hypotenuse.

There are actually several different types of right triangles. For example, if the two legs have the same length, we call it an isosceles right triangle. If one of the acute angles measures exactly 45 degrees, we call it a 45-45-90 triangle, and if one of the acute angles measures exactly 30 degrees and the other measures 60 degrees, we call it a 30-60-90 triangle. These triangles have special properties that make them useful in many different areas of math and science.

In summary, a right triangle is a type of triangle that has one angle measuring 90 degrees and two acute angles. It has a hypotenuse and two legs, and it is the only type of triangle that the Pythagorean theorem can be applied to. There are different types of right triangles, including isosceles right triangles, 45-45-90 triangles, and 30-60-90 triangles, each with its own unique properties.

Answer:

To determine how many loaves will not meet quality standards on Tuesday, we need to count the number of integers in the sample that are between 1 and 50, inclusive. From the given sample, we can see that there are 2 integers that fall between 1 and 50: 47 and 4. Therefore, we can predict that 2 loaves will not meet quality standards on Tuesday.

To calculate the difference between the number of sub-standard loaves produced on Monday and the number predicted to be sub-standard on Tuesday, we need to subtract the number of sub-standard loaves on Monday from the number predicted for Tuesday.

Number of sub-standard loaves on Monday = 50

Number predicted to be sub-standard on Tuesday = 2

Difference = 2 - 50 = -48

The difference is -48, which means that there were 48 fewer sub-standard loaves predicted on Tuesday than the number produced on Monday.

The total monthly payment of Ricky with an APR of 3.84 % is given by the equation M = $ 1,208.0523

The annual percentage yield (APY) is the real rate of return earned on an investment, taking into account the effect of compounding interest. An APR is a number that represents the total yearly cost of borrowing money, expressed as a percentage of the principal loan amount.

The monthly payment [tex]M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1][/tex]

where

M = Total monthly payment

P = The total amount of your loan

I = Your interest rate, as a monthly percentage

N = number of months for paying off your mortgage

Given data ,

Let the monthly payment be represented as M

Now , the number of years n = 20 years

The annual interest rate i = 3.84 %

The total loan amount P = $ 258,000

Now , the monthly payment [tex]M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1][/tex]

On simplifying , we get

[tex]M = 258,000 [ ( \frac{ 0.0384}{12} ) ( 1 + \frac{ 0.0384}{12} )^{12*30} ] / [ ( 1 + \frac{ 0.0384}{12} )^{12*30} - 1 ][/tex]

[tex]M = 258,000 [ (0.0032 ) ( 1.0032 )^{360} ] / [ ( 1.0032 )^{360} - 1 ][/tex]

On further simplification , we get

M = 258,000 [ 0.0101078417 ] / [ 2.158700543922579 ]

M = 258,000 ( 0.00468237327729 )

M = $ 1,208.0523

Hence , the monthly payment of Ricky is $ 1,208.0523

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Answer:

can you explain a bit better what the problem is?

The value of the integral ∫(1+3x) dx is equal to 14.

Integration is a process of adding up small elemental volumes to find the larger volume.

Given is to find the integral -

∫(1+3x)

We can find the equivalent values as -

∫(1+3x) dx = ∫1 dx + ∫3x dx

∫(1+3x) dx = x + 3x²/2

For the limit x = 1 to x = 3, we can write -

∫(1+3x) dx = (3 + 27/2) - (1 + 3/2)

∫(1+3x) dx = 33/2 - 5/2 = 14

Therefore, the value of the integral ∫(1+3x) dx is equal to 14.

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Answer:

19

Step-by-step explanation:

111111111

+

1111111111

count how many 1ns are there.

ans is 19

Answer:

The investment in the fund was $19000 x 0.12 = $2280

The investment in the stock was $19000 - $2280 = $16720

The net profit was $520, so the amount of the profit from the fund was $520 x (2280/16720) = $136

The amount of the loss from the stock was $520 - $136 = $384

The equation for the given statement can be written as:

-95x - 14 = -70 - x

To solve for x, we can rearrange the equation and combine like terms:

-95x + x = -70 + 14

-94x = -56

Next, we can divide both sides by -94 to isolate x:

x = -56/-94

Finally, we can simplify the fraction to get our answer:

x = 28/47

Therefore, the solution to the equation is x = 28/47.

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The probability that the sum of numbers we will get will be 6 is 7/27.

Probability is simply the possibility that something will happen.

Since we don't know how something will turn out, we can talk about the possibility of one outcome or the likelihood of several.

The study of events that fit into a probability distribution is known as statistics.

Probability, or the likelihood that an event will occur, is calculated by dividing the number of favorable outcomes by the total number of potential possibilities.

A coin toss serves as the most simple illustration.

When you flip a coin, there are only two possible outcomes: heads or tails.

So, the probability formula:

P(E) = Favourable events/Total events

We need to get the probability of getting the sum of 6.

Then, calculate as follows:

P(E) = Favourable events/Total events

P(E) = 7/27

Therefore, the probability that the sum of numbers we will get will be 6 is 7/27.

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Correct question:
3 three-sided dice (with sides labeled 1, 2, and 3) are rolled and their sum is recorded. What is the probability of rolling a sum of 6?

Answer:t= 1/4

Step-by-step explanation:

Divide both sides by -2/3, and simplify which would leave u with 1/4.

Answer:

12 feet

Step-by-step explanation:

Let x be the length of the shorter part of the pipe.

According to the problem, the longer part is three times as long as the shorter part. Therefore, the length of the longer part is 3x.

We also know that the sum of the lengths of the two parts is equal to the original length of the pipe, which is 16 feet.

So we can write an equation:

x + 3x = 16

Simplifying this equation, we get:

4x = 16

Dividing both sides by 4, we get:

x = 4

So the length of the shorter part is 4 feet, and the length of the longer part is 3 times as long, or 3 × 4 = 12 feet.

The solution to the equation 17(4 + 15) is 323

An equation is an expression that shows the relationship between two numbers and variables using mathematical operations like addition, subtraction, multiplication, exponents

Given the equation:

17(4 + 15)

= 17(19)

= 323

OR

17(4 + 15)

= 17(4) + 17(15)

= 68 + 255

= 323

The solution to 17(4 + 15) can be gotten by determining the product of 17 and 19; or adding the product of 17 and 4 to the product of 17 and 15

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Answer:

x = 145

Step-by-step explanation:

We are given a polygon that has 7 sides. We can use the formula [tex]S=(n-2) * 180[/tex] which allows us to write an algebraic expression to solve for x where n = number of sides.

[tex]S=(7-2) * 180[/tex]

Evaluate

[tex]S=5*180[/tex]

[tex]S=900[/tex]

Now that we have our number, lets write an algebraic expression that will help us find the value of x.

[tex]x+116+129+120+130+135+125=900[/tex]

Add like terms

[tex]x+755=900[/tex]

Subtract 755 on both sides

[tex]x=145[/tex]

We can check our work by adding all the angle measures together

[tex]145+116+129+120+130+135+125=900[/tex]

Thus we know 145 is the correct answer.

Answer:

Please Mark Brainlaiest Answer

Step-by-step explanation:

The best linear approximation for f(x) = cos(x) near x = pi/2 is given by the equation:

y = -(x - pi/2) + 1

This is because the linear approximation should have the same value and slope as the original function at x = pi/2.

At x = pi/2, the value of f(x) = cos(pi/2) = 0. The value of the linear approximation at x = pi/2 is:

y = -(pi/2 - pi/2) + 1 = 1

So, the value of the linear approximation matches the value of the original function at x = pi/2.

The slope of the original function at x = pi/2 is -sin(pi/2) = -1. The slope of the linear approximation is:

y' = -1

So, the slope of the linear approximation also matches the slope of the original function at x = pi/2.

Therefore, the best linear approximation for f(x) = cos(x) near x = pi/2 is:

y = -(x - pi/2) + 1

Hence, the correct option is "y equals negative x plus pi over 2 plus 1".

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Verified Answer ✅

The equations that determine the cost of each hamburger and each fries is 4x + 5y = 20 and 10x + 7y = 41.20

An equation is an expression that shows the relationship between two numbers and variables using mathematical operations like addition, subtraction, multiplication, exponents

Let x represent the cost of each hamburger and y represent the cost of each fries.

She purchased 4 hamburgers and 5 fries for $20.00, hence:

4x + 5y = 20    (1)

She purchased 10 hamburgers and 7 fries for $41.20, hence:

10x + 7y = 41.20   (2)

From both equations, solving simultaneously:

x = 3; y = 1.6

The cost of each hamburger is $3 while the cost of each fries is $1.6

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The formula for the volume of a d-dimensional sphere of radius r is:

V_d(r) = (π^(d/2) / Γ(d/2 + 1)) * r^d

It should be noted that in the formula, Γ is the gamma function.

Let's break down the formula:

π^(d/2) is pi raised to the power of d/2.

Γ(d/2 + 1) is the gamma function evaluated at d/2 + 1.

r^d is the radius raised to the power of d.

Putting it all together, we get the formula above.

For a 2-dimensional sphere (a circle) of radius r, we have d=2, so:

V_2(r) = (π^(2/2) / Γ(2/2 + 1)) * r^2

= (π / Γ(3/2)) * r^2

= (π / (1/2) * √π) * r^2

= 2πr^2

For a 3-dimensional sphere of radius r, we have d=3, so:

V_3(r) = (π^(3/2) / Γ(3/2 + 1)) * r^3

= (4/3) * π * r^3

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