Answer:
.......
Step-by-step explanation:
I'm sure you know the formula for Pythagoras Theorem.
The formula is 
C = Your hypotenuse
A + B = The other two adjacent sides.
So you plug in the numbers

And you'll get the answer, which is 56.
Answer:
0
Step-by-step explanation:
Use slope intercept form: 
=
= 0
Answer: 12
Step-by-step explanation: