PERT Mathematical Reasoning & Problem Solving 3

Question 1

Solve for y: y/4 + 3 = 7.

Accepted Answer

16

Answer

Subtract 3 to get y/4 = 4, then multiply by 4 to get y = 16.

Question 2

What is 15% of 240?

Accepted Answer

36

Answer

15% of 240 is 0.15 × 240 = 36.

Question 3

If f(x) = 2x² - 1, what is f(3)?

Accepted Answer

17

Answer

f(3) = 2(9) - 1 = 18 - 1 = 17.

Question 4

Factor completely: x² - 9.

Accepted Answer

(x + 3)(x - 3)

Answer

x² - 9 is a difference of squares, factoring to (x + 3)(x - 3).

Question 5

A car travels 180 miles in 3 hours. What is its average speed?

Accepted Answer

60 mph

Answer

Average speed is distance divided by time = 180/3 = 60 mph.

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