Question

I can't fail and no one has answered my previous questions so please help.

Given f(x) = 5x – 2, what is f(–4)

A.
–40

B.
–22

C.
–1

D.
40

Answer 1

When you know your equation f(x) and they want you to find f(-4), it means that they want to know what f(x) is worth when x=-4 Therefore, you only need to plug in you x in the equation f(x)=5x-2 f(-4)=5(-4)-2 =-20-2 =-22 (B)