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Which of the following expressions represents the sum of three times a number and eight times a different number?

A. 3x+8y

B. 8x+3x

C. 3x-8y

D. 8x-3y

Answer Explanation:

Let two numbers be x and y. Then

Three time a number=3x

Eight times a different number = 8y

Sum of the two is 3x+8y

Therefore, the Correct Answer is A.

Q #1: Which of the following is the mostly likely weight of a pencil?

A. 25 kg

B. 25 cm

C. 25 mg

D. 25 g

Answer Explanation

The most likely weight of pencil is 25 g, because a pencil is a lighter object which is measured in grams.
Q #2: As the number of credit hours a student takes in a semester increases, the amount of tuition, the amount of access fees, and the number of student loans available also increase. Which of the following is the independent variable?

A. Amount of tuition

B. Number of credit hours

C. Amount of access fees

D. Number of student loans available

Answer Explanation

Independent is a variable that determines the outcome of the other variable. In this case, the credit hours determine how other three variables change. Thus, the number of credit hours is the independent variable.
Q #3: Which of the following values is the greatest?

A. 4.25

B. 10/3

C. 4.4

D. 9/2

Answer Explanation

To compare the given values, convert them to the same number format. In this case, convert the given fractions into equivalent decimals.

10/3=3.3333…..

9/2=4.5

Thus, the numbers become 4.25, 3.333…, 4.4, 4.5

Now arranging them in ascending order becomes 3.333…., 4.25, 4.4, 4.5

From the above, 4.5 is the greatest value.

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