What is the answer for this 5c + 9 -2c -7

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

What is sin 7x/4 ? i need on this urgent trig

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?