Question

ERRE

What is the radius of a circle whose equation is (x + 5)2 + (y - 3)2 = 42?
2 units
4 units
8 units
0 16 units

Answer 1

4 units

Explanation:

(x + 5)^2 + (y - 3)^2 = 4^2

The equation for a circle is written in the form

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

The center is (-5,3) and the radius is 4