Math question: "Find the limit as x approaches 3 of (2x+1) / (x^2-9)."
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Math question: A right triangle has one angle measuring 30 degrees, and the side opposite to this angle has a length of 5 units. What is the length of the hypotenuse?
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Math question: What is the equation of a parabola with vertex at (2,4) that opens downward?