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1) Quadrillateral ABCD is circumscribed about circle O. AB=7, BC=11 DC=8. Find AD.
2) Find the center and radius of the equation: X(squared)-12x+y(squared)+14y+4=0
3) Find the intersection point(s) of the equations:
5x+6y=30
x(squared)+y(squared)=25
2) Find the center and radius of the equation: X(squared)-12x+y(squared)+14y+4=0
3) Find the intersection point(s) of the equations:
5x+6y=30
x(squared)+y(squared)=25