Question

I need Algebra 2 help! ;-;
I've been in bed for the past week sick and I do FLVS, & I need to catch up. Can someone check these answers please? I don't understand this and I'm pretty sure I'm doing this wrong. :c

Question 1 (Multiple Choice Worth 1 points)
Let f(x) = Find f(-2).
-6
-3
3
6

Question 2 (Multiple Choice Worth 1 points)
Let f(x) = x2 - 8x + 5. Find f(-1).
-4
-3
13
14

Question 3 (Multiple Choice Worth 1 points)
Let f(x) = x - 2 and g(x) = x2 - 7x - 9. Find f(g(-1)).
-21
-3
3
21

Question 4 (Multiple Choice Worth 1 points)
Let f(x) = x + 8 a