gwendolyn7 gwendolyn7 05-05-2017 Mathematics contestada The center of a circle is at (−3, 1) and its radius is 9. What is the equation of the circle? A.) (x+3)2+(y−1)2=81 B.) (x−3)2+(y+1)2=18 C.) (x−3)2+(y+1)2=81 D.) (x+3)2+(y−1)2=18