Question

What is the equation of a circle with center (2, -5) and radius 4?

Answer 1

The equation of a circle is (x-k)^2+(x-h)^2= r^2
k= the x value you are given in the ordered pair
h= the y value you are given in the ordered pair
so plug it in and do (x-2)^2+(x-(-5))^2= 4^2

then you will get (x-2)^2+ (x+5)^2= 16 and there you have your answer.

Answer 2

Thank you!