Question

I am stuck on a question about composition functions. They want you to find f(g(x)) and g(f(x)) using the following numbers:

g(x)= 10x
f(x)= x (squared)+4

Answer 1

Those are not numbers, they are called functions.

First consider f{g(x)}
Substitute 10x for the x in the f(x) function.

f{g(x)} = 100 x^2 + 4

Now consider g{f(x)}
Substitute x^2 +4 for x in the g(x) function.
g{f(x)} = 10 (x^2 +4) = 10x^2 + 40

Answer 2

Thank you! i had those answers but they looked funny. Thanks again