Ximena corrió 11/4 de kilómetros en la mañana y 15/5 kilómetros en la tarde ,¿cuánto corrió en total?​

Question and answers are in the attached picture. you so much in advance.

Factor the monomial completely 42a3b3

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