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Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box