F(x) =3x^2 +2x-13 ; k=3

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

Need this asap if anyone can i would be very grateful. if you could show workings that would really

What is the shape of the height and weight distribution