The equation of a circle is (x + 3)2 + (y – 5)2 = 81. Determine the coordinates of the center of the circle and the length of the radius.

Center (-3, 5), radius is 9

Center (3, 5), radius is 9

Center (-5, -3), radius is 81

Center (5, 3), radius is 81

Question

The equation of a circle is (x + 3)2 + (y – 5)2 = 81. Determine the coordinates of the center of the circle and the length of the radius.
		
Center (-3, 5), radius is 9
		
Center (3, 5), radius is 9
		
Center (-5, -3), radius is 81
		
Center (5, 3), radius is 81

alyssa_xo · Answer

circles of the form (x-a)2 + (y-b)2 = r2 are circles with radius r and center (a,b)