The sales tax for an item was $20 and it cost $500 before tax. Find the sales tax rate. Write your answer as a percentage.
​

The  total number of each type of ball:

Football: Given as 8

Basketball: 18

Baseball: 40

Softball: 15

For basketball:

2 + 2(8) = 18

First, we evaluate the expression inside the parentheses: 2(8) = 16

Then, we add 2 to the result: 16 + 2 = 18

So, the total number of basketballs is 18.

For baseball:

5(8) = 40

We simply multiply 5 by 8 to get the total number of baseballs, which is 40.

For softball:

6 + 1/2(18) = 24

First, we evaluate the expression inside the parentheses: 1/2(18) = 9

Then, we add 6 to the result: 9 + 6 = 15

So, the total number of softballs is 15.

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Answer:

65/100 that is the answer to this question

1) The value of A ∪ B is,

A ∪ B = {<, +, =, /, >, x }

2) The value of A ∩ M is,

A ∩ B = {2}

3) The value of B ∩ C is,

B ∩ C = { }

4) The value of M - J is,

M - J = {soap}

5) The complement of set A is,

A' = (to, combat, coronavirus}​

Now, WE can simplify as;

1) We have;

A = {<, +, =, x) and B = {=, +, /, >}

Hence, We get;

The value of A ∪ B is,

A ∪ B = {<, +, =, /, >, x }

2) Given that,

A = {1, 2, 4) and M = {2, 3, 5}

Hence, The value of A ∩ M is,

A ∩ B = {2}

3) Given that;

B = {C, O, U, G, H) and C = {F, E, V, E, R)

Hence, The value of B ∩ C is,

B ∩ C = { }

4) Given that;

M = {soap, alcohol, sanitizer, mask) and J = {alcohol, sanitizer, mask, gloves}

Hence, The value of M - J is,

M - J = {soap}

5) Given that;

U = {Frontliners, sacrifice, their, lives, to, combat, coronavirus) and A = {Frontliners, sacrifice, their, lives)

Hence The complement of set A is,

A' = U - A

A' = (to, combat, coronavirus}​

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Solving a system of equations we can see that the costs are:

For a chair, 3/2 dollars.

For a table, 25/4 dollars.

Here we can define the variables:

x = cost of rending a chair.

y = cost of renting a table.

Here we can write a system of equations:

8x + 4y = 37

3x + 2y = 17

We can subtract two times the second equation from the first one:

8x + 4y - 2*(3x + 2y) = 37 - 2*17

2x = 3

x = 3/2

And the value of y is:

3*(3/2) + 2*y = 17

2y = 17 - 9/2 = 25/2

y = 25/2/2

y = 25/4

These are the costs in dolllars.

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Answer: Area = = 38.5 - Perimeter - 29.6819.

Step-by-step explanation:

To find the perimeter and area of a triangle with vertices L(5,5), M(-2,-4), and N(5,-6), we can use the distance formula and the formula for the area of a triangle.

Perimeter:

The perimeter of a triangle is the sum of the lengths of its sides. We can find the lengths of each side using the distance formula, which states that the distance between two points (x1, y1) and (x2, y2) is given by:

d = √((x2 - x1)^2 + (y2 - y1)^2)

Using this formula, we can calculate the lengths of LM, MN, and NL:

LM = √((-2 - 5)^2 + (-4 - 5)^2)

= √((-7)^2 + (-9)^2)

= √(49 + 81)

= √130

MN = √((5 - (-2))^2 + (-6 - (-4))^2)

= √((7)^2 + (-2)^2)

= √(49 + 4)

= √53

NL = √((5 - 5)^2 + (-6 - 5)^2)

= √((0)^2 + (-11)^2)

= √(0 + 121)

= √121

= 11

The perimeter of the triangle is the sum of these three sides:

Perimeter = LM + MN + NL

= √130 + √53 + 11 = 29.6819

Area:

To calculate the area of the triangle, we can use the formula for the area of a triangle using the coordinates of its vertices. The formula is given by:

Area = 0.5 * |x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2)|

Using the coordinates of L(5,5), M(-2,-4), and N(5,-6), we can calculate the area:

Area = 0.5 * |5(-4 - (-6)) + (-2)(-6 - 5) + 5(5 - (-4))|

= 0.5 * |5(2) + (-2)(-11) + 5(9)|

= 0.5 * |10 + 22 + 45|

= 0.5 * |77|

= 38.5

Therefore, the perimeter of the triangle is given by √130 + √53 + 11 = 29.6819 units, and the area of the triangle is 38.5 square units.

The lateral surface area of the triangular base prism is 288 m².

The lateral area of the triangular base prism can be found as follows:

Lateral area of the triangular base prism = (a + b + c)h

where

Therefore,

a = 7 m

b = 8 m

c = 9 m

h = 12 m

Therefore,

Lateral area of the triangular base prism = (7 + 8 + 9)12

Lateral area of the triangular base prism = 24 × 12

Lateral area of the triangular base prism = 288 m²

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The calculated measure of the angle 1 is 43 degrees

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

The circle

Also, we have

The line AB tangent to the circle

This means that

Angle 1 = 1/2 * the arc subtended by the line

So, we have

Angle 1 = 1/2 * 86

Evaluate

Angle 1 = 43

Hence, the measure of the angle 1 is 43 degrees

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The value of x indicated in the right angle of EFG is determined as 36.

option D.

The value of x is calculated by applying the principle of sum of angles in a right angle triangle as follows;

A right triangle has a right angle and two angles that are complementary.

If angle EFG is a right angle, then the sum of angles at point F is 90 degrees.

The value of x is calculated by setting up the following equations;

2x + 6 + 12 = 90

2x + 18 = 90

2x = 90 - 18

2x = 72

x = 72/2

x = 36

Thus, the value of x is calculated by applying the principle of sum of angles in a right angle triangle.

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Answer:

Angles 3 and 5 are consecutive interior angles.

The probability that a customer ordered vanilla ice cream given they ordered a sundae is 0.75, or 75%.

To find the probability that a customer ordered vanilla ice cream given they ordered a sundae, we can use the concept of conditional probability.

The conditional probability of an event A given event B is denoted as P(A|B) and is calculated as the probability of both events A and B occurring divided by the probability of event B.

In this case, we want to find P(vanilla|sundae), which represents the probability of a customer ordering vanilla ice cream given that they ordered a sundae.

Using the given probabilities:

P(vanilla) = 0.3

P(sundae) = 0.2

P(vanilla and sundae) = 0.15

The probability of a customer ordering a sundae is the denominator for the conditional probability. Therefore, P(sundae) will be the denominator.

P(vanilla|sundae) = P(vanilla and sundae) / P(sundae)

Substituting the given values:

P(vanilla|sundae) = 0.15 / 0.2

Now we can simplify:

P(vanilla|sundae) = 0.15 / 0.2

= 0.75

Therefore, the probability that a customer ordered vanilla ice cream given they ordered a sundae is 0.75, or 75%.

In conclusion, based on the given probabilities, there is a 75% chance that a customer who ordered a sundae also ordered vanilla ice cream.

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The function [tex]G(t)= 1024(0.5)^{t-1[/tex] models the number of computer games sold where t is the number of days since the release date and G(t) is the number of computer games sold.

The given table is

Days After                        Number of

Release Date                   Games sold

       0                                   1024

       1                                     512

       2                                     256

       3                                     128

Here, the common ratio = 512/1024

= 1/2

The formula to find nth term of the geometric sequence is aₙ=arⁿ⁻¹. Where, a = first term of the sequence, r= common ratio and n = number of terms.

Here, [tex]G(t)= 1024(0.5)^{t-1[/tex]

Therefore, the function [tex]G(t)= 1024(0.5)^{t-1[/tex] models the number of computer games sold where t is the number of days since the release date and G(t) is the number of computer games sold.

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The dollar value of total revenue at each price is $[tex]0[/tex], $[tex]10[/tex], $[tex]12[/tex], $[tex]12[/tex], $[tex]10[/tex], and $[tex]6[/tex]. Total revenue will be the greatest at a price of $[tex]4[/tex], with [tex]3[/tex] units sold.

To find the dollar value of total revenue at each price, we can multiply the price by the corresponding quantity in the demand schedule:

Price: $[tex]6[/tex]

Quantity: [tex]0[/tex]

Total Revenue: $[tex]6 \times 0[/tex] = $[tex]0[/tex]

Price: $[tex]5[/tex]

Quantity: [tex]2[/tex]

Total Revenue: $[tex]5 \times 2[/tex] = $[tex]10[/tex]

Price: $[tex]4[/tex]

Quantity: [tex]3[/tex]

Total Revenue: $[tex]4 \times 3[/tex] = $[tex]12[/tex]

Price: $[tex]3[/tex]

Quantity: [tex]4[/tex]

Total Revenue: $[tex]3 \times 4[/tex] = $[tex]12[/tex]

Price: $[tex]2[/tex]

Quantity: [tex]5[/tex]

Total Revenue: $[tex]2 \times 5[/tex] = $[tex]10[/tex]

Price: $[tex]1[/tex]

Quantity: [tex]6[/tex]

Total Revenue: $[tex]1 \times 6[/tex] = $[tex]6[/tex]

To determine at which price the total revenue will be the greatest, we observe that the highest total revenue occurs at the price with the highest quantity sold. In this case, the price with the highest quantity is $[tex]3[/tex], and the corresponding quantity sold is [tex]4[/tex] units.

Therefore, at a price of $[tex]3[/tex], the total revenue will be the greatest, with [tex]4[/tex] units sold.

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The center of the circumscribed circle is (1, 5).

We calculate the midpoint and slope of the line segment AB:

Midpoint of AB = ((x₁ + x₂) / 2, (y₁ + y₂) / 2)

Midpoint of AB = ((2 + 0) / 2, (8 + 8) / 2)

Midpoint of AB = (1, 8)

Slope of AB = (y₂ - y₁) / (x₂ - x₁)

= (8 - 8) / (0 - 2)

Slope= 0

We can notice that the equation of the perpendicular bisector of AB is x = 1.

We also find midpoint and slope of the line segment  BC

Midpoint of BC = ((x₁ + x₂) / 2, (y₁ + y₂) / 2)

= ((0 + 2) / 2, (8 + 2) / 2)

= (1, 5)

Slope of BC = (y₂ - y₁) / (x₂ - x₁)

= (2 - 8) / (2 - 0)

= -3

y - 5 = -3(x - 1)

y - 5 = -3x + 3

3x + y = 8

we have the equations of two perpendicular bisectors which are

x = 1 and 3x + y = 8.

We Substitute x = 1 into 3x + y = 8:

3(1) + y = 8

3 + y = 8

y = 5

In conclusion, center of the circumscribed circle is (1, 5).

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The sum between n = 1 and n = 5 is 15.5, so the correct option is the second one.

Here we have the summatory:

[tex]\sum^{5}_{n = 1} 2^{n - 2}[/tex]

So we just need to add the 5 terms (between n = 1 and n = 5)

So we will get the sum:

S = [ 2¹⁻² + 2²⁻² + 2³⁻² + 2⁴⁻² + 2⁵⁻²]

S = [2⁻¹ + 2⁰ + 2¹ + 2² + 2³]

S = [0.5 + 1 + 2 + 4 +8]

S = 15.5

So the correct option is the second one.

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Answer:

The answer is 275 students.

Step-by-step explanation:

In 75 students, 33 students attend.

So the ratio is 33/75.

so multiply with 625.

625 x 33/75 = 275

The probability that a given student said math was their favorite subject was 3.44

The mathematical notion of probability measures the possibility of an event happening. A number between 0 and 1 is used to indicate it, with 0 denoting impossibility (the event won't happen) and 1 denoting certainty (the event will unquestionably happen). In probability theory, the probability of an event is determined based on a set of assumptions or information available. It is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

Here, the total outcome is 299 and favorable outcome is 87.

Hence, the probability is 299/87 = 3.44

Therefore, probability that a given student said math was their favorite subject was 3.44.

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The height of the average fourth grader is 137cm 1mm. This height can be determined by multiplying 3 by the average height of a newborn baby.

Given information,

The average height of babies = 45 cm 7mm

45 cm 7 mm is equivalent to 45.7 cm (since there are 10 millimeters in a centimeter).

Let the height of a fourth grader be x.

According to the question,

The height of a fourth grader (x) = 3 × the average height of a newborn baby

The height of a fourth grader (x) = 3 × 45.7

The height of a fourth grader (x)= 137.1 = 137cm 1mm

Therefore, the height of a fourth grader is 137cm 1mm.

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The sound emitted from the jet plane has a sound intensity of approximately 149.13 decibels.

Using the formula:

D = 10 * log(I/I0),

where D represents the sound intensity in decibels, I is the given sound intensity, and I0 is the reference intensity of 10^-12 watts per square meter.

Substituting the given values:

D = 10 * log(8.2*10^2 / 10^-12).

To simplify the calculation, we can rewrite the division as multiplication by the reciprocal:

D = 10 * log(8.2*10^2 * 10^12).

Using the logarithm property log(a * b) = log(a) + log(b):

D = 10 * (log(8.2) + log(10^2) + log(10^12)).

Using the logarithm property log(a^b) = b * log(a):

D = 10 * (log(8.2) + 2 * log(10) + 12 * log(10)).

Since log(10) = 1:

D = 10 * (log(8.2) + 2 + 12).

D = 10 * (log(8.2) + 14).

Using a calculator or logarithm table, we can find log(8.2) ≈ 0.913.

D = 10 * (0.913 + 14).

D = 10 * 14.913.

D ≈ 149.13.

Therefore, the sound emitted from the jet plane has a sound intensity of approximately 149.13 decibels.

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Answer:

See below

Step-by-step explanation:

Where the graph crosses the x-axis will solve the equation

The exponential regression equation that best fits the data is y = 2^x.

To determine which exponential regression equation best fits the given data points (2, 4), (3, 8), (4, 16), and (5, 32), let's analyze the options for regression equations:

Option 1: y = 2^x

Option 2: y = 3^x

Option 3: y = 4^x

Option 4: y = 5^x

To find the best fit, we need to compare the predicted y-values from each equation with the actual y-values of the given data points.

The equation that produces the least amount of error or the closest predicted y-values to the actual ones will be the best fit.

Let's calculate the predicted y-values for each option using the given x-values:

Option 1: [tex]y = 2^2, 2^3, 2^4, 2^5 = 4, 8, 16, 32[/tex]

Option 2:[tex]y = 3^2, 3^3, 3^4, 3^5 = 9, 27, 81, 243[/tex]

Option 3:[tex]y = 4^2, 4^3, 4^4, 4^5 = 16, 64, 256, 1024[/tex]

Option 4:[tex]y = 5^2, 5^3, 5^4, 5^5 = 25, 125, 625, 3125[/tex]

By comparing the predicted y-values with the actual y-values of the data points, we can determine which option provides the closest fit.

Based on the given data points, we can observe that the predicted y-values from Option [tex]1 (y = 2^x)[/tex] match the actual y-values most closely.

The predicted values for Option 1 are 4, 8, 16, and 32, which exactly match the given data points.

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The complete question may be like: Consider the following data points: (2, 4), (3, 8), (4, 16), (5, 32). We need to determine which exponential regression equation best fits this data. Please provide the options for the regression equations so that I can assist you in finding the best fit.

The correct statement regarding the association in the scatter plot is given as follows:

Since the y-values decrease as the x-values increase, the scatter plot shows a negative association.

There can either be a positive association between variables or a negative association between variables, as follows:

In this problem, we have a decreasing scatter plot, hence there is a negative association between the variables.

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Answer:

measure of angle 7 + measure of angle 8 = 180°.

400Answer:

Step-by-step explanation:

The quadratic equation shown in the graph is:

y = x² + 2x - 8

Here we want to find the graph of the given quadratic equation, where we only know the zeros of it.

Remember that if a quadratic equation has the zeros:

x = a

x = b

Then we can write it as:

y = (x - a)*(x - b)

Here the zeros are:

x = -4

x = 2

Then we can write:

y = (x + 4)*(x - 2)

Expanding that we will get the standard form:

y = x² + 4x - 2x - 8

y = x² + 2x - 8

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The area of the Rhombus-shaped keychain is 3 square centimeters.

The area of the rhombus-shaped keychain,

we can use the formula:

Area = (diagonal1 * diagonal2) / 2

Given that the horizontal diagonal has a length of 2 centimeters and

the vertical diagonal has a length of 3 centimeters,

we can substitute these values into the formula:

Area = (2 * 3) / 2

    = 6 / 2

    = 3 cm^2

Therefore, the area of the rhombus-shaped keychain is 3 square centimeters.

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Answer:

Step-by-step explanation:

the of of 50 percent of people is married

Answer: The answer is...

y = -2/3 x + 1

Step-by-step explanation:

The others would have crossed paths with y = -2/3 x + 10