Answer:
(3) y = 12
Explanation:
The circle is centered at (x, y) = (-5, 2) and has a radius of 10. Hence the most positive y-value is y = 12.
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Complete the squares of x-terms and of y-terms.
(x^2 +10x) + (y^2 -4x) = 71
(x^2 +10x +25) + (y^2 -4x +4) = 71 + 25 + 4
(x +5)^2 +(y -2)^2 = 10^2 . . . . . . . a circle centered at (-5, 2) with radius 10.