10

Set 1: Function Notation (Beginner)

Explanation

Answer: A

PROBLEM

If f(x) = 5x + 7, find f(8).

If f(x) = 5x + 7, find f(8).

A.

47

✓ Correct
B.

44

C.

48

D.

49

Detailed Explanation

Choice A is the best answer. f(8) = 5(8) + 7 = 40 + 7 = 47

Why others are wrong:
B: 44 is incorrect because it does not satisfy the equation.
C: 48 is incorrect because it does not satisfy the equation.
D: 49 is incorrect because it does not satisfy the equation.

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