One side of a ship has marks spaced 3 feet apart. four marks are underwater. how many feet of the ship are underwater

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.

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !