Write an expression to represent: three times the sum of 5 and a number, n Hana's car used 3/4 of a tank of gas to cross Arizona. The gas tank on her car holds 15 1/2 gallons. how many gallons of gas did it take to cross Arizona, what was her mpg?
also that

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?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

If the class was going to get a class pet and 5 picked fish and 7 pick bird and 8 picked rabbits have many students were in the