The center of a circle is at (7, - 3) and it has a radius of 9. What is the equation of the circle?

(x - 7) 2 + (y + 3) 2 = 3

(x + 7) 2 + (y - 3) 2 = 3

(x + 7) 2 + (y - 3) 2 = 81

(x - 7) 2 + (y + 3) 2 = 81

Question

23 December, 06:47

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Phoebe · Answer 1

Given:

center (7,-3)

radius = 9

Equation of the circle:

(x-h) ² + (y-k) ² = r²

(x-7) ² + (y - (-3) ² = 9²

(x-7) ² + (y+3) ² = 81 Last option.

The center of a circle is at (7, - 3) and it has a radius of 9. What is the equation of the circle?(x - 7) 2 + (y + 3) 2 = 3(x + 7) 2 + (y - 3) 2 = 3(x + 7) 2 + (y - 3) 2 = 81(x - 7) 2 + (y + 3) 2 = 81