N+5/16=-1 what is the answer?

What could explain what happened when the time was equal to 120 minutes

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

Prove that quadrilateral is a rhombus.