What is the value of (y^-5/x^-3) for x = 2 and y = -4

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

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

Can someone me and do the problem plz so i can understand it more better