Is line AB tangent to circle below

Yes, Line AB is tangent to the circle.

Step-by-step explanation:

if x decreases by 4 then y increases by 10

step-by-step explanation:

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square