Can someone help me with this??

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

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog