Digital PSAT Math Practice Question 319: Answer and Explanation

Question: 319

If f(x) = 7x + 3 andg(x) = 2x², what is the value of f(g(1))?

Grid-In:

Correct Answer: 17

Explanation:

17 Work inside out by first solving for g(1):

g (x) = 2 x^{2} \to g (1) = 2 {(1)}^{2} = 2

Then put 2 in for x in the f(x):

f (x) = 7 x + 3 \to f (2) = 7 (2) + 3 = 17