The center of circle (x-5)^2 + (y-13)^2=81 is (-5,-13). true or

False. because

the equation of a circle is (x-h)^2 + (y-k)^2 = r^2 and the center is (h,k) 
if the center of a circle is (-5, -13) substitute the values into the equation 
so(x- -5)^2 + (y- -13)^2 = r^2  which is (x+5)^2 + (y+13)^2 = r^2 

in this case, because you are only asking about the center of the circle from the equation the 81 or radius of the circle doesn't matter. 

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