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Conics
(Answer ID # 0518029)
Write the standard equation, the center, and the radius for each circle.

1.   x2   +   y2   =   1 64	2.   x2   +   y2   =   81
3.   x2   +   y2   =   49	4.   x2   +   y2   =   1 16
5.   -x2   -   y2   +   36   =   0	6.   -3x2   -   3y2   +   21   =   0
7.   x2 + y2 + 6y + 1   =     0	8.   x2 + y2 - 18x - 18y + 157   =     0
9.   x2 + y2 + 12x + 2y + 37   =   4 9	10.   x2 + y2 + 16x + 64   =   225 121
11.   x2 + y2 - 4x + 10y + 29   =   1 25	12.   x2 + y2 + 2x + 12y + 37   =   361 49
13.   x2 + y2 + 6x - 16y + 73   =   1 4	14.   x2 + y2 + 14x - 8y + 65   =   4 9
15.   x2 + y2 - 8x + 14y + 57   =     0	16.   x2 + y2 - 10x + 4y + 27   =     0

 

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