SOLUTION: (Bonus) Concentric circles have the same center but different radii. Write equations for two concentric circles centered at ( -3, 5) with radii of 7 and 9.

Algebra ->  Rational-functions -> SOLUTION: (Bonus) Concentric circles have the same center but different radii. Write equations for two concentric circles centered at ( -3, 5) with radii of 7 and 9.      Log On


   

Question 853218: (Bonus) Concentric circles have the same center but different radii. Write equations for two
concentric circles centered at ( -3, 5) with radii of 7 and 9.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The general equation for a circle centered at (h,k) with radius R is,
%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2
highlight%28%28x%2B3%29%5E2%2B%28y-5%29%5E2=49%29
Now you can do the second one, same center, different radius.