Answer this please will give brainliest

Ineed with number 17 i don’t get it at alll

What is the standard form of -5x^2+2x^4-11+x^3+3x

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