Which equation results from taking the square root of both sides of (X-9)% = 81?
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X-9 = +9
x + 9 = +9
x + 3 = +9
X - 3 = +9

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which expression is equivalent to 3^3 + 2^2?