What is 18 more than 59?

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done

In what organelle does photosynthesis take place?