Question

Which equation represents a circle with a center at (-4, 9) and a diameter of 10 units?

(X-92 + (y + 4)2= 25
(x + 4)2 + ( - 92 = 25
O (X - 9)2 + (x + 4)2 = 100
(x + 4)2 + (y - 92 = 100

Answer 1

b

Explanation:

the dude above is correct, i copied his answer and got it right

Answer 2

(x+4)^2 + (y-9)^2 = 25

Explanation:

We can use the equation (x-h)^2 + (y-k)^2 = r^2

where (h,k) is the center and r is the radius

The center is at (-4,9) and the diameter is 10 which means the radius is 10/2 or 5

(x- -4)^2 + (y-9)^2 = 5^2

(x+4)^2 + (y-9)^2 = 25