Answer:
B) -7
Step-by-step explanation:
x+y
8+(-15)=8-15=-7
Answer:
I did the first one on paper
Step-by-step explanation:
i also sent one page of my personal notes on right triangle Pythagoerean thereom I hope this helps
Answer:
The answer is D, 
Step-by-step explanation:
By graphing each one in a graphing tool like Desmos, you can determine which one it is.
If your looking for an actual explanation on how it is found, I can't really help you on that one.
Answer:
56.5
Step-by-step explanation: