Circle A -- center(2, 0), radius 8 Circle A' -- center(-1, 5), radius 3
The answer is 8. This is because when you substitute 8 with “a” you then solve the problem to see if it is equal to the answer. -4+8=4... -4+4=0 so that is wrong and -4+O=-4 which is also incorrect.
I don’t know but I hope you had a good day