What is the simplified form of 4π √5 - 2π √5 ÷ 3 √5

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 a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

The collection of beautiful oil paintings currently on display at an art gallery well defined; set not well defined; not a set