<PRE><B>Question 1057077</B>
 write the standard equation for each circle. then state the coordinates of its center and give its radius
x^2+y^2+4y=12 
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(x-0)^2 + y^2 + 4y + 4 = 12 + 4
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(x-0)^2 + (y+2)^2 = 16
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Center:: (0,-2) ; radius = sqrt(16) = 4
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Cheers,
Stan H.</PRE>