Question

identify the center and radius of a circle with equation (x - 7) ^2 + (y + 6)^2 = 16

Answer 1

The equation of a circle is (x-a)^2+(y-b)^2=c^2, where (a,b) is the circle's center and c is the circle's origin. Therefore this circle is at (7,-6) and has a radius of 4.

Answer 2

The correct answer is 
4