Question

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

(
x0)(4) 24
( 4) ( ) 25
( 0) ( ) 100
(x+4)*( 0) 100

Answer 1

Answer: it’s d (x+4)2+(y-9)=100

Explanation:

Took it on edgunity btw

Answer 2

(x + 4)² + (y - 9)² = 25

Explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

here (h, k) = (- 4, 9) and r = 10 ÷ 2 = 5, thus

(x - (- 4))² + (y - 9)² = 5², that is

(x + 4)² + (y - 9)² = 25