Mark brainliest please mark
I am not 100% positive.
10 teams play every other ( = 5) once
10 x 5 = 50 games total
I would go with C. like the other person
Answer:
(x-7)^2+(y-8)^2=121
Step-by-step explanation:







The first case occurs in

for

and

. Extending the domain to account for all real

, we have this happening for

and

, where

.
The second case occurs in

when

, and extending to all reals we have

for

, i.e. any even multiple of

.