Un agricultor ha sembrado 4/5 partes de un campo con arroz y 2/3 con trigo. si aún quedan 18000m2 sin sembrar que superficie tiene el campo

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online