Question

Help. I did a problem but my answer is not an option. Can you show me where I messed up?

Answer 1

f[g(-4)]

Answer 2

i ended up with f(3)=-4.

Answer 3

and f(x) and g(x)???

Answer 4

we need to know the definition of g(x) and f(x)

Answer 5

the first step is replace x with -4 in the definition of g(x)

Answer 6

gx i got 3 for.
i just told you the answer of fx.

Answer 7

do you have g(x)= expression with x in it ?

Answer 8

No, I'm sure they meant what exactly are f(x) and g(x) ?
Like, f(x) = 3x + 4 or something like that...

Answer 9

f(x) = x2 − 13 and g(x) = x + 5

Answer 10

g(x) = x + 5

g(-4) is short hand for "replace x with -4"
g(-4)= -4 + 5

what do you get ?

Answer 11

+1. then how did i get 3.

Answer 12

now f(g(-4)) is f(1)
f(x)= x^2-13
replace x with 1
what do you get ?

Answer 13

-12. i still don't understand how i got -4 as my answer though. I did the work the same.

Answer 14

It is hard to guess the musings of your mind. The important thing is do you see how to do this problem? It takes two steps:
find g(-4)
put that number in f(x) to find f(g(-4))

Answer 15

Yeah. Thanks.