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A circle is centered at (−4, 9)  and has a radius of 11.

What is the equation of the circle?

Enter the equation in the box using lower case variables x and y.

Acceptfully  May 29, 2017
 #1
avatar+90048 
+2

 

Using     (x - h)^2  + (y - k)^2  =  radius^2     where  h, k   is the center, we have

 

( x -  -4)^2  +  (y - 9)^2   =  11^2

 

(x + 4) ^2   + ( y - 9 )^2  =   121 

 

 

cool cool cool

CPhill  May 29, 2017

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