Answer:
a) 11
b) 9
Step-by-step explanation:
a) x=4 y=3
2x+y
2(4)+(3)
8+3
=11
b) a=-2 b=5
a^2+b
(-2)^2+(5)
4+5
=9
Answer:
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Answer:

Step-by-step explanation:
<u>Use the Pythagorean Theorem</u>
The equation for the Pythagorean Theorem is 
* a and b are the lengths of the legs, and c is the hypotenuse.*
(To know which side is the hypotenuse look at longest side which is across the right angle).
a= x, b=8, c=9

Let's Plug in the side lengths:

Evaluate 8^2 and 9^2:

Subtract 64 from both sides:


Take the square root of both sides:

___________________________
Answer:
noooooooo
Step-by-step explanation: