Find the center (h, k) and radius r of the circle with the given equation. x2 + y2 + 2x - 4y = 31
A. (h, k) = (2, -1); r = 6
B. (h, k) = (1, -2); r = 36
C. (h, k) = (-2, 1); r = 36
D. (h, k) = (-1, 2); r = 6
Answer: D
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Identify the radicand and index of the expression.xy2 
A. xy2; 2
B. 
; 3
C. x + 6; 3
D. 
; 2
Evaluate
Solve the problem.Sara is in charge of painting a mural on the side of a building. The wall is 33 meters long. The wall is 2x meters high up to the window ledge and it is 6y meters from the window ledge to the top. Write an expression with parentheses for the area of the wall. Then use the distributive property to write the expression without parentheses.
A. 2x(6y + 33) = 12xy + 66x square meters B. 33(2x + 6y) = 66x + 198y square meters C. 2x(6y + 33) = 12xy + 33 square meters D. 33(2x + 6y) = 66x + 6y square meters
Decide whether or not the ordered pair is a solution to the equation.x + y = 6; (3, 8)
A. Yes B. No