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OpenStudy (anonymous):
which of the following is an equation of the circle with center (2,-1) and radius 7? a.x^2+y^2-4x-2y-44 =0 b.x^2+y^2+4x-2y-44 =0 c.x^2+y^2-4x+2y-44 =0 d.x^2+y^2+4x+2y-44 =0
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OpenStudy (anonymous):
(x-2)^2+(y-1)^2=7^2
OpenStudy (agent0smith):
^it should be (y+1)^2 though
OpenStudy (anonymous):
sorry wrong typing
OpenStudy (anonymous):
C?
OpenStudy (anonymous):
yes, C
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