Which of the following shows the expression below with the numbers substituted for the variables?
(m ÷ 4) - p(3n + 1), for m = 8, n = 2 and p = 3

select the best answer from the choices provided.
(8 ÷ 4) - 2(3 + 1)
(8 ÷ 4) - [3(2) + 1]
(8 ÷ 4) - 3[3(2) + 1]
(2 ÷ 4) - 8[3(2) + 1]

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?