Please help i don't understand this. just help with number one so i can get an idea on how to do this

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 cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm