The formula for finding the area of a trapezoid is a = 1/2(b1+b2) h where a represents the area of the trapezoid, b1 and b2 are based, and h represents the height. solve for the formula for h.

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?