Answer:

Step-by-step explanation:
Pythagorean theorem

Picture is too tiny I can’t see
Answer: -12 but could be wrong
Step-by-step explanation:
I don't know that format but I'm going to take a guess.
x^2 +2x - 8 -(2x+8) then plug in x=2
x^2 + 2x - 8 - 2x - 8
x^2 -16
= 2^2 - 16 = -12
Answer:
b
Step-by-step explanation:
83+37=129, 120÷24=5