PSAT Math Multiple-Choice Question 416: Answer and Explanation

Question: 416

If f(x) = -4x + 1 and what is the value of ?

• A. -11
• B. 0
• C. 2.5
• D. 3

Correct Answer: A

Explanation:

A

Difficulty: Hard

Getting to the Answer: The notation f (g(x)) means: find g(x), then substitute the result into f(x). Substitute for x in g(x) and simplify:

Next, substitute the result into f(x):

Therefore, so (A) is correct.