Recording the number of pages in each book in one book shelf in a library is an example of measuring a . a. population

b. sample

c. not enough information to decide

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?

Can some one me with these questions

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827