Answer:
x^2 + y^2 = 49
Step-by-step explanation:
For center (h,k) and radius r, eqution of the respective circle is
(x-h)^2 + (y-k)^2 = r^2
Answer:
U
Step-by-step explanation:
Answer:
C, F, and maybe D are correct.
Step-by-step explanation:
Answer:
a = 9
Step-by-step explanation:
a+11=20
Subtract 11 from each side
a+11-11 = 20-11
a = 9