Find the percent of change of 2/5 to 1/3?

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan 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?

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

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52