How do you do this? If you can give me the answer it’s fine :)

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

Consider the function f(x)=-5x+3 what is f(-2)

How many solutions does the nonlinear system of equations graphed below have?