Question: If the lengths of the two sides of a triangle are 5 cm and 7 cm, and the measure of the included angle is 60 degrees, what is the length of the third side?
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Find the vertex (h,k) of the parabola 𝑦 = 2𝑥^2 + 4𝑥 - 3.
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Question: What is the formula for calculating the variance of a sample?