Joe spends $500 on supplies and then $25 per week in a t-shirt business if she makes 200 per week how long will it take her to make a profit

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

Ihonestly have no clue if it's each or none.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left