The points G(-4, 8), H(-9, 5), I(−5, –3), and J(0, 0) form quadrilateral GHIJ. Plot the points then click the "Graph Quadrilateral" button. -10 Graph Quadrilateral Reset Click on the graph to plot a point. Click a point to delete it. -9 -8 -7 -6 -5 -4 -3 -2 -1 10 9 8 7 6 5 4 3 2 1 -1 1 2 3 4 5 6 7 100 8 9 10

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A: (21) Given equation is y=−x2−10x−20 We have to write the equation y=−x2−10x−20 in vertex form. We…

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A:

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A: The answer is found in step-2