Question

f(x)=3x-7 and g(x)=-2x-6. Find (fog)(4). Please explain solution

Answer 1

(fog)(x) = f(g(x))

which implies that you have to replace all the X in F(X) by g(x)
hope this helps :)

Answer 2

Sorry no, I need to see how to start the solution.

Answer 3

\[fog(x)=f(g(x))=3(g(x))-7=3(-2x-6)-7\]
Simplify and put x=4

Answer 4

so, 3(-8-6)-7?

Answer 5

Yep

Answer 6

Then 3(-2)-7= -6-7=-1?

Answer 7

Nope, what is -8-6?

Answer 8

-14

Answer 9

Yes, try the calculation again now

Answer 10

Ok 3(-14)-7=-42-7=-35?

Answer 11

Nope, you did the same mistake again, Remember it's -42-7 and NOT -42-(-7)

Answer 12

-49

Answer 13

yes

Answer 14

Thank you!

Answer 15

Welcome