HELP PLZ "Is triangle ABC a right triangle? Use measurements from all sides of the triangle to argue yes or no"​

Which set of reflections would carry trapezoid abcd onto itself? a) x-axis, y=x, y-axis, x-axis b) x-axis, y-axis, x-axis c) y=x, x-axis, x-axis d) y-axis, x-axis, y-axis, x-axis

Write the rational number in lowest terms 99/-15

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