Which of the following gives all of the coefficients of the algebraic expression -2x2 + 17 -15x + 7xy?

15
-15, -2
-15, -2, 7
-15, -2, 7, 17

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

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Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.