How to find the surface area of a rectangle

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

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1