Find the center and radius of the circle.4x2 + 4y2 - 8x - 16y - 16 = 0
A. (1, 2), r = 3
B. (-1, -2), r = 9
C. (-2, -1), r = 9
D. (2, 1), r = 3
Answer: A
Mathematics
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What will be an ideal response?
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Solve the equation.log72 (x2 - x) = 1
A. {-8, -9} B. {1, 72} C. {-8, 9} D. {8, 9}
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