Answer:A
Step-by-step explanation:
10(-1c+7)-3c
(-10c+70)-3c
-13c+70 is your answer
Check the picture below.
since the circle is centered at the (0,0) origin, and a point on it is at (0, -9), its radius is simple the distance between those two, or r = 9.
if the second point is also on the circle, it must also be 9 units away from the origin.

Answer:
I;m doing great now that I am done with school for the year, have a rarely good monday
Step-by-step explanation: