Question

If f(x) = 2x + 7, which of the following shows the correct way to find f(5)? A. (2 + 7)/5 B. 25 +7 C. 2(5) + 7 D. 2(5 + 7)

Answer 1

Substitute 5 for x in the function f(x) = 2x + 7.

$\begin{gathered} f(5)=2\cdot5+7 \\ =2(5)+7 \end{gathered}$

Option C is correct.