So,
Based in the information of the problem given, we could make the following question:
"How many problems does she complete in one week?"
Given that she complete 30 problems for her math homework each night and she has math homework five nights a week, we could multiply:
[tex]\frac{30problems}{night}\cdot\frac{5nights}{week}=150\frac{problems}{week}[/tex]Therefore, she completes 150 problems per week.