Math Question: "Graph the inequality system: y ≤ 2x + 3 and y > -x - 1. How many points in the shaded region satisfy both inequalities? State your answer as a range.
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What is the sine value of the angle π/4 on the unit circle?
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What is the variance of the following set of numbers: 5, 8, 12, 15, 21, 28?