How do you find the area of a rectangle?

The figure above shows the lengths of thesides of a rectangle in cm. find the valuesof x and y and then the area of the rectangle.sides: top= 3x - yleft= 3y + 4bottom= 2x + yright= 2x - 3 use both methods, elimination and substitution, if possible.

If the measure of xyz is 81 what is the measure of yz

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?