Digital PSAT Math Practice Question 140: Answer and Explanation

Question: 140

If f (x) = g(x) + 4 and if , what is the value of f(10)?

• A. 9.5
• B. 10
• C. 13.5
• D. 14

Correct Answer: C

Explanation:

(C) First, you must plug the expression for g (x) into f (x) where it's indicated:

Next, plug 10 in for x in f(x):

Choice (C) is the correct answer.

Geometry and Trigonometry Drill