What is one fifth of 15

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

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

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?