Question

Find the radius and the center (x+3)2 + (y+8)2 = 81

Answer 1

Answer:

This means the center is (-3,-8) and the radius is 9

Step-by-step explanation:

(x+3)^2 + (y+8)^2 = 81

The equation of a circle can be written as

(x-h)^2 + (y-k)^2 = r^2  where the center is (h,k) and the radius is r

We can rewrite the above equation as

(x- -3)^2 + (y - -8)^2 = 9^2

This means the center is (-3,-8) and the radius is 9