Answer:
[tex]5N+100[/tex]
Step-by-step explanation:
Let N represent number of people.
We have been given that the skating rink and $5 for each person. So amount charged for N people would be [tex]5N[/tex].
We are also told that the skating rink charges $100 to reserve the building, so total cost charged for N people would be amount charged for N people plus reservation amount that is:
[tex]5N+100[/tex]
Therefore, the expression [tex]5N+100[/tex] represent the cost for any number of people.