How do you find the formula for the actual temperature from and anomaly

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

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?