Answer:
v= 5/6
Step-by-step explanation:
You have to divide -6 on both sides to isolate the variable V. Then it would become -5/-6. The negative signs cancel out.
We need to FOIL that out and then get it into standard form to see what our A, B, and C are. FOILing gives us

. If we move the 7 over by subtraction and set it equal to 0, we have

. In order to avoid a negative leading coefficient, we can change all the signs to get

so A = 1, B = 0, C = -18, first choice above.
Equation of circle at center (h,k) is given by

Given that center is at (5,0) that means h=5 and k=0
plug both values into above formula

...(i)
Given that circle passes through point (1,1) so it will satisfy above equation




Now plug this value of r^2 into equation (i)
which best matches with choice C
Hence
is the final answer.