NerdKid4ever NerdKid4ever

20-03-2016
Mathematics

Answered

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

Verified Answer :

20-03-2016

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)

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