What is the median of a set of 9 distinct integers, where the sum of the 4th and 6th largest values is 10?
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What is the vertex, axis of symmetry, and the value of f(x) when x=3 for the quadratic function f(x) = x^2? What is the maximum or minimum value of f(x)?
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What is the x-coordinate of the vertex of the quadratic function y = x^2 + 4x + 3?