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HannahGreenBeanz HannahGreenBeanz
  • 09-02-2017
  • Mathematics
Answered



Which choice gives the center and radius of the circle represented by the equation?


(x-7)^2 + (y+3)^2 = 25

A(7, 3); 25
B(–7, –3); 5
C(7, –3); 5
D(–7, 3); 5

Verified Answer :

LammettHash
LammettHash LammettHash
  • 09-02-2017

\((x-h)^2+(y-k)^2=r^2\) is the equation of a circle centered at \((h,k)\) with radius \(r\).

Here \(h=7\), \(k=-3\), and \(r^2=25\implies r=5\). So the answer is (C)

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