Answer please so hard

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?

Which expression is rational? 6. , square root two, square root 14, square root 49

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?