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2 August, 01:58

An equation of a circle is given as (x + 6) ² + (y - 7) ² = 81. Find the center and radius of the circle. Show all work to receive full credit.

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  1. 2 August, 03:15
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    Center is (-6,7) and radius is 9. A circle with a center at (h, k) and a radius of r has the equation (x-h) ^2 + (y-k) ^2=r^2 so h = - 6 k = 7 r is 9 you just work back wards, what two numbers multiplied gives you 81? Well 9
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