Find the 5th term of the expansion of (6x+6y)^11

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?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?