I believe the answer is -51+60 because it equals -9. And -51-(-60) is 9.
For a square, the area is the square of the side length (length x width = area, but in a square length = width). That means the side length is the square root of the area.
In this case the side length is the square root of 121, which is 11. Answer is C.
Answer:
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Step-by-step explanation: