given f(x) = -3x+4 and g(x) = x+7

Question

what is the value of g(f(2))

Answer 1

We work from the inside out.

 

f(2) = -3(2) + 4

f(2) = -6 + 4

f(2) = -2

 

g(-2) = -2 + 7

g(-2) = 5

 

Orrrrrr...

 

g(f(2)) = -3(2) + 4 + 7

g(f(2)) = -6 + 4 + 7

g(f(2)) = 5