Evaluate this piecewise function at x=-6 and x=2

Anyone know? will mark brainliest if you're correct!

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

Simply 8x squared + 5(7x squared- x) - 2x =