If n > 5, then in terms of n, how much less than 7n -4 is 5n +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?

The area of a rectangle is 54x^9y^8 square yards. if the length of the rectangle is 6x^3y^4 yards, which expression represents the width of the rectangle in yards

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost