Z^2-16z=-17 what is the solution?

Which expression is equivalent to 4 square root 6 divided by 3 root 2

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

Nine more than four times a number is the same as one less than twice the number. find the number?