Which is an equation of the circle with a radius of 9 units and center at (–4, 2)?
A. (x − 9)2 + (y + 4)2 = 4
B. (x − 4)2 + (y + 2)2 = 81
C. (x + 4)2 + (y − 2)2 = 81
D. (x − 2)2 + (y + 4)2 = 81

Question

Which is an equation of the circle with a radius of 9 units and center at (–4, 2)?
A. (x − 9)2 + (y + 4)2 = 4
B. (x − 4)2 + (y + 2)2 = 81
C. (x + 4)2 + (y − 2)2 = 81
D. (x − 2)2 + (y + 4)2 = 81

anonymous · Answer

standard circle equation:$$(x - h)^2 + (y-k)^2 = r^2$$where the point (h, k) is the center and r is the radius

anonymous · Answer

is it C

jdoe0001 · Answer

http://www.mathwarehouse.com/geometry/circle/images/equation-of-circle/general-formula-equation-of-circle.png

jdoe0001 · Answer

what do you think?

anonymous · Answer

yes it is. sorry for taking so long