No. The circle can be composed of completely negative coordinates, but the radius is always a positive value. You can prove this by plugging any point and the center into the distance formula.
Answer:
6r+7=13+7r
6r+7=7r+13
6r+7−7r=7r+13−7r
−r+7=13
−r+7−7=13−7
−r=6
= 
r=−6
Step-by-step explanation:
:) This is the answer
Answer:
I doesn't know but, I blow your junk
Step-by-step explanation:
Because it could be any of these
Put this in your calculator or use pictures if you'd like. (3/4) x 12 and you'll get 9