Let f(x)=-2x-7 and G(x)=-4x+6. Find (g o f)(-5)

Question

austinl · Answer

Ok, we have:

$f(x)=-2x-7$
$g(x)=-4x+6$

We want
$(gof)(x)=g(f(x))$
So that means that we plug f(x) into g(x) wherever there is an x.

$g(f(x))=-4(-2x-7)+6\rightarrow 8x+34$

anonymous · Answer

The answers that I can have are A)26 B)3 C)-59 D)-6

austinl · Answer

I was making sure that you were following me.

anonymous · Answer

I follow you.

anonymous · Answer

I got to that point but I can't figure out how to get a whole number answer.

austinl · Answer

Then you plug in - for all instances of x :)

anonymous · Answer

Plug in negative?

austinl · Answer

-5*
My numlock was off...

anonymous · Answer

Thanks a ton! I got it! It was -6!

austinl · Answer

No problemo!

goformit100 · Answer

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