**3 (x-2) = 18**

**Solve the equation above for x. Which of the following is the correct answer?**

8

-5

7

4

*Correct Answer : A*

We solve for the value of x by following the order of operations

3(x-2)=15

Divide both sides of the equation by 3

Add 2 to both sides of the equation

Thus, the value of x is 8.

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#### Explanation

An independent variable is a change that when modified brings a change in other variables. In this case, the person increases his climbing rate, calories burned, distance traveled and energy used increases. Therefore, the walking speed is the independent variable while other variables are dependent.

### Correct Answer is A

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A ratio is of the form a : b but can also be converted to a fraction of the form a/b, where b is not equal to zero. Besides, to in ration means per in fraction form.

In the class of 40 students, 22 are girls and 18 are boys. Thus, the ratio of girls to boys becomes:

*Â *

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Â

In ratio form, girls: boys=11:9

Thus, the ratio of girls to boys in a class of 40 students is 11 to 9.

### Correct Answer is B

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The median of a data set is found in two ways:

For an odd data set, the median fall in the (N+1)/2 th position.

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To find the median of the given data set, we need to arrange the elements from the smallest to the largest as follows:

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Median =(11+1)/2=12/2=6 th position.

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### Correct Answer is D

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### Correct Answer is C

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Total distance run by athlete=7+3=10 miles

Total time=45+15 =60 minutes

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### Correct Answer is D

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### Correct Answer is C

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Profit earned=60% of $27 = 60/100 * 27 = $16.20

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### Correct Answer is A

#### Explanation

We solve for the value of x by following the order of operations

3(x-2)=15

Divide both sides of the equation by 3

Add 2 to both sides of the equation

Thus, the value of x is 8.

### Correct Answer is B

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In this scenario, we use the given scale in the charts to find the number of each coin and selected the right number of coins the student collected.

From the above evaluations, option two is the correct choice.

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