📅2026 FAFSA Deadline: June 30, 2026→
3

Set 5: Function Notation (Beginner)

Explanation

Answer: D

PROBLEM

If f(x) = 3x + 9, find f(10).

If f(x) = 3x + 9, find f(10).

A.

36

B.

42

C.

40

D.

39

✓ Correct

Detailed Explanation

Choice D is the best answer. f(10) = 3(10) + 9 = 30 + 9 = 39

Why others are wrong:
A: 36 is incorrect because it does not satisfy the equation.
B: 42 is incorrect because it does not satisfy the equation.
C: 40 is incorrect because it does not satisfy the equation.
← PreviousNext →