Question

given f(x) and g(x) find the indicated function f(x)=-8x+1 g(x)=4^2+5x-6 find f(g(-3))

Answer 1

I'm assuming g(x) should be g(x)=4x^2+5x-6

Answer 2

what is g(-3) equal to?

Answer 3

17 but wouldnt you plug g into f?

Answer 4

17 is close, but not correct

Answer 5

15

Answer 6

this means f(g(-3)) = f(15)

Answer 7

to evaluate f(15), you plug x = 15 into f(x)

Answer 8

-119

Answer 9

yes

Answer 10

so did i do it the right way where i plugged f in to g and got -8(4x^2+5-6)+1 plug in -3 for x and came out with -119??

Answer 11

or is the way we just did it the right way?

Answer 12

there are 2 ways to do it, so either works

Answer 13

you can either plug x = -3 into g(x) to get 15

then plug 15 into f(x)

Answer 14

or you can plug (4x^2+5x-6) for each x of f(x)

then plug in x = -3

Answer 15

k so i was doing it right thanks

Answer 16

np