Question

a circle is centered at (-4,9)and has a radius of 11. what is the equation of the circle. use x and y​

Answer 1

(x + 4)^2 + (y-9)^2 = 121

Explanation:

We can write the equation of a circle as

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

(x - -4)^2 + (y-9)^2 = 11 ^2

(x + 4)^2 + (y-9)^2 = 11 ^2

(x + 4)^2 + (y-9)^2 = 121