I am not to sure but I would go for B. identity.
Answer:
306
Step-by-step explanation:
-2 + 3 = 1
so really it would take 306 times to get to this
Answer:

Step-by-step explanation:
Let's use a start by using common denominators.
and 
Now, replace the original equation with the common denominators. 
Solve! 
Answer:
2
Step-by-step explanation:
You are right as rain. You go to the x axis.
Find x = 3.5
f(3.5) is the y value of x = 3.5
f(3.5) = 2
It might help you a bit if you wrote it as a point (3.5,2)
If I could see the photo I could help you answer the question