Barry simplified 5x – 3y – x + 6z, as shown. 5x – 3y – x + 6z 5x – x – 3y + 6z 5 + 3yz describe two mistakes barry made, and find the correct solution.

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?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?