Select the proper placement for parentheses to speed up the addition for the expression 2 + 9 + 8 + 1 a. (1 + 2) + (9 + 8) b. (9 + 2) + (8 + 1) c. (8 + 2) + (9 + 1) d. (8 + 9) + (2 + 1)

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?