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Let \(f(x) = 2x - 3\) and \(g(f(x)) = 5-4x.\) Find \(g(4).\)

 Mar 14, 2021
 #1
avatar+311 
0

5-4(4)

 

5-16

 

-11

 

Actually i'm confused, it's either -15 or -11, I don't remember 6th grade math.

 

Yay!

 Mar 14, 2021
edited by Varxaax  Mar 14, 2021
 #2
avatar+32062 
+2

When g(f(x)) = g(4) it means that f(x) = 4

 

So 4 = 2x - 3  or x = 7/2

 

So g(4) = 5 - 4*7/2  or g(4) = -9

 Mar 14, 2021

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