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13 May, 11:51

What is the radius of the following circle? (x+5) 2 + (y-10) 2=121

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  1. 13 May, 12:14
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    Hint: (x + 10) ^2 + (y + 15) ^2 = 121 (x - (-10)) ^2 + (y - (-15)) ^2 = 121 (x - (-10)) ^2 + (y - (-15)) ^2 = 11^2 Compare the last equation to (x-h) ^2 + (y-k) ^2=r^2
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