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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.

More Questions on TEAS 7 Math

  • Q #1: A leather recliner is on sale for 30% less than its original price. A consumer has a coupon that saves an additional of 25% off of the sale price. If the consumer pays $237 for the recliner, which of the following is the original price of the recliner to the nearest dollar?

    A. $316

    B. $431

    C. $451

    D. $527

    Answer Explanation

    Total percent discount is 30%+25%=55%

    So, the percentage of client pays for the recliner is 100%-55%=45%.

    The 45% is what represents $237 and the original price is 100%, which is determined as follows:

    The original price of the recliner is $526.60 which is approximately $527.

  • Q #2: (x/y)-z=rw Solve for x in the equation above.

    A. X=y(z+rw)

    B. X=rw(y-z)

    C. X=rwy+z

    D. X=rwy-z

    Answer Explanation

    Given the equation (x/y)-z=rw, we make x the subject of the formula as follows:

    (x/y)-z=rw

    Add z to both sides of the equation

    (x/y)-z+z=rw+z

    (x/y)=rw+z

    Multiply both sides by y

    (x/y)*y=y(rw+z)

    X=y(rw+z)

    Rearranging the equation results in:

    X = y(z+rw)

  • Q #3: 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.