Question

X2 + y2 – 2y – 99 = 0

What is the center of this circle ?
],
What is the radius of this circle ?
units

Answer 1

The center is at (h, k) : (0, -1) and the radius is 10. ... The radius is 10. That is, since r^2 = 100, r must be 10.

Explanation:

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