Question

Attached

Answer 1

@Baayen @wckeller

Answer 2

b

Answer 3

This, like the last question you posted, is a composition:
f of g of -1; f(g(-1))

First plug in -1 for all the X's in the g(x) function:
\[g(-1)=(-1)^2-7(-1)-9\]
\[g(-1)=1+7-9\]
\[g(-1)=8-9\]
\[g(-1)=-1\]
Because g(-1)=-1, we need to plug in -1 for all the X's in the f(x) function:
\[f(-1)=(-1)-2\]
\[f(-1)=-3\]
Therefore, f(g(-1)) or, f of g of -1, is equal to -3...
Final answer: B. -3