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Which expression gives the area of the triangle shown below

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.