100 points what is the length of cd¯¯¯¯¯ ? 7 9 15 18

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan 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?

If value of cos330° is √3/2 then find tan165°.

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract