Question

Let f(x) = -4x + 7 and g(x) = 10x - 6, find f(g(x)).

Answer 1

Do you have an idea of how to begin?

Answer 2

Plug in g(x) where ever there is an x in f(x)..

Answer 3

i have no idea where to start

Answer 4

ok, so first, do you know what f(g(x)) means?

Answer 5

g(x) becomes the X part of the f(x) function ?

Answer 6

yep, this is called a composition. so, basically with this problem you plug and chug until it is as simple as you can get it

Answer 7

so its f(x)=-4(10x-6)+7?

Answer 8

yup, now you need to simplify

Answer 9

aka get rid of the parentheses somehow, and combine like terms

Answer 10

im at f(x)= -40x+31?

Answer 11

that is 100% correct good work!

Answer 12

thank you for your help!

Answer 13

but just semantics, you want to write f(g(x)) not f(x)

Answer 14

np good luck with your class!