1 is B.
2 is x > 3
4 is d+0.06d
I don't know 3, but I'll ask it for you, since you don't have many points.
Answer:
-9
Step-by-step explanation:
1y+11=20
-11=-11
-1y=20-11
-1=9
-9
And we are given that
and want to find the value of x. Set f(x) to 16 and we get the equation:

Subtract both sides by 4

Divide both sides by 2

This is the answer. Let me know if you need any clarifications, thanks!