If a shape has 6ft, 11ft, 2ft, and 5ft, what would be the area?

(hurry! ) which expression is equivalent to the following complex fraction?

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Solve: 3x+y=6 4x-2y=18 show all work !