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Select the lengths in centimeters that would form a right triangle

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.