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If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.