Find the values of x and y using the given chord, secant, and tangent lengths.
by power of point, we have x^2=6x21=126
x=$\boxed{3\sqrt{14}}$
9(9+y)=81+9y=126
9y=45
y=$\boxed{5}$
by power of point, we have x^2=6x21=126
x=$\boxed{3\sqrt{14}}$
9(9+y)=81+9y=126
9y=45
y=$\boxed{5}$