Question

Answer to if f(x)=-2x+8 and g(x)=√x+7, what is (f*g)(2)?

Answer 1

\[\sqrt{(-2x+8)+7}\] feeling pretty good of that one

Answer 2

i don't remember the (FoG) formula. can someone please remind me?

Answer 3

to find (f o g) you take your x in g and replace it with the function f if i remember correctly

Answer 4

why are there parenthesis?

Answer 5

just to show you the substitution made

Answer 6

g(2)=3
f(3)=-2(3)+8=2

Answer 7

So if I remove them it's still fine?

Answer 8

@lalay that looks better, what did you do?

Answer 9

awww 8(

Answer 10

nothing against you or your answer, I just don't think that's correct, and I don't want to submit it and find out if it is or isn't unless everyone is sure. And I haven't had a radicle at all before for these problems.. I'm sorry, idk which is right.

Answer 11

I can go ahead and check though.. Might as well.

Answer 12

first g(2) = sqrt 2+7 = sqrt 9 =3
then f(g(2))=f(3) = -2*3 +8 =2

Answer 13

Idk what to do :(

Answer 14

The first answer was incorrect.. I have a new question now?

Answer 15

(f*g)(2) = f(g(2))
so first u find g(2)
u substitiute 2 in g(x)
which is sqrt 9 =3
then f(g(2)) = f(3)
u substitute 3 in f(x)

whats ur question

Answer 16

If f(x)=-7x+2 and g(x)=√x+3, what is (f*g)(-2)

Answer 17

g(-2) = sqrt 1 = 1
f(g(-2)) = f(1) = -7+2 = 5

Answer 18

How do I solve f(g(-2)) = f(1) = -7+2 = 5?

Answer 19

since g(-2) = 1
then f(g(-2)) = f(1) u jus replace g(-2) bye its value which is 1
thn substitute 1 in f(x) u get -7(1)+2 = -5