Re-write the statement 19+7÷2-5 by including ONE pair of brackets to make the total value equal to 8

What is the range for 31,39,29,34,37,24,36,33,34,28

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?

How can constraints be used to model a real-world situation?