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3 July, 15:15

Which equation represents a circle with a center at (-4.9) and a diameter of 10 units?

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

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

(x - 9) 2 + (y + 4) 2 = 100

(x + 4) 2 + (y - 9) 2 = 100

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  1. 3 July, 15:50
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    (x+4) ^2 + (y-9) ^2 = 25

    Step-by-step explanation:

    We can write the equation of a circle as

    (x-h) ^2 + (y-k) ^2 = r^2

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

    We know the diameter is 10 so the radius is 1/2 * 10 = 5

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

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