GED - General Educational Development Math Test #9 1

Question 1

Solve for x: 3x + 7 = 22

Accepted Answer

5

Answer

Subtract 7 from both sides to get 3x = 15, then divide both sides by 3 to get x = 5.

Question 2

A rectangle has a length of 12 cm and a width of 7 cm. What is its area?

Accepted Answer

84 cm²

Answer

Area of a rectangle = length × width = 12 × 7 = 84 cm². The perimeter (38 cm × 2 sides = 76) is a common distractor but is not the area.

Question 3

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

Accepted Answer

60 mph

Answer

Average speed = distance ÷ time = 180 ÷ 3 = 60 mph.

Question 4

What is the slope of the line passing through the points (2, 3) and (6, 11)?

Accepted Answer

2

Answer

Slope = (y₂ − y₁) / (x₂ − x₁) = (11 − 3) / (6 − 2) = 8 / 4 = 2.

Question 5

The ages of five students are 13, 14, 15, 16, and 17. What is the mean (average) age?

Accepted Answer

15

Answer

Mean = sum of values ÷ number of values = (13 + 14 + 15 + 16 + 17) ÷ 5 = 75 ÷ 5 = 15.

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