IBEW Aptitude Test Algebra and Functions Questions and Answers 2

Question 1

Solve for x: 2x + 9 = 3x - 4

Accepted Answer

x = 13

Answer

9 + 4 = 3x - 2x. 13 = x.

Question 2

If f(x) = 5x - 2, find x when f(x) = 18.

Accepted Answer

x = 4

Answer

5x - 2 = 18. 5x = 20. x = 4.

Question 3

Simplify: 4(2x - 3) - 2(x + 5)

Accepted Answer

6x - 22

Answer

8x - 12 - 2x - 10 = 6x - 22.

Question 4

The power in a circuit is P = V²/R. If V = 120 and R = 60, what is P?

Accepted Answer

240 watts

Answer

P = 120² / 60 = 14400 / 60 = 240 watts.

Question 5

Graph of f(x) = 2x + 1. What is the y-intercept?

Accepted Answer

y = 1

Answer

In y = mx + b form, the y-intercept is b = 1. The point is (0, 1).

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