The square root of 100

What is 32+4 x (16 x 1/2) -2 show your work}

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 the value of cos330°is√3/2 then find cos 165°.