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22 December, 01:54

What is the equation of a circle with center (-4, 7) and radius 6?

A. (x - 4) 2 + (y + 7) 2 = 6

B. (x + 4) 2 + (y - 7) 2 = 36

C. (x + 4) 2 + (y - 7) 2 = 6

D. (x - 4) 2 + (y + 7) 2 = 36

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  1. 22 December, 05:05
    0
    B.

    The equation of a circle is:

    (x-h) ^2 + (y-k) ^2 = r^2 - where (h, k) is the centre and r is the radius

    Therefore, a circle with centre (-4,7) and radius 6 has the equation:

    (x - (-4)) ^2 + (y-7) ^2 = (6) ^2

    (x+4) ^2 + (y-7) ^2 = 36
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