Probability of a coin landing on heads

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?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

5x−4≥12 or 12x+5≤−4 can you with this problem