Question

If f(x) = 2(18 – 9x) + 4x, what is the value of f(7)?

Answer 1

f(7) = -62

Explanation:

Basically, what the question is asking us to do is to plug in 7 every time we see an x.

f(x) = 2(18 - 9x) + 4x

f(7) = 2(18 - 9(7)) + 4(7)

f(7) = 2(18-63) + 28

f(7) = 2(-45) + 28

f(7) = -90 + 28

f(7) = -62

Answer 2

-62

Explanation:

f(x)=2(18-9x)+4x

f(7)=2(18-9(7))+4(7)

f(7)=2(18-63)+28

f(7)=2(-45)+28

f(7)=-90+28

f(7)=-62