Dolphinlover021
contestada

15 POINTS
Identify the center and radius of a circle with equation (x-4)^2 + (Y+2)^2 =9

A.) Center at (4,2); radius: 9
B.) Center at (-4,2); radius: 9
C.) Center at (4,-2); radius: 3
D.) Center at (-4, 2); radius: 3

Respuesta :

upandover

The basic formula for a circle is (x - h)^2 + (y - k)^2 = r^2, where the center is (h, k) and the radius is found by taking the square root.

h = 4

k = -2

Center: (4, -2)

square root of 9 = 3

Radius: 3

Correct Answer: C

Hope this helps!
Center (6 , -5) and radius = 3