Kia rides her bicycle at 20 miles per hour. Which equation represents the situation?

Let h represent the hours traveled.
Let d represent the distance traveled.

A. d = 20h
B. h = 20d
C. d = 20 + h
D. h = 20 – d

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