Answer:
90 minutes
Step-by-step explanation:
Let g represent the amount of time spent on the geography quiz and h represent the amount of time spent on the history quiz.
[tex]g-30=h\\h*2=g\\g/2=h\\[/tex]
The geography quiz took Nadia 60 minutes to finish.
The history quiz took Nadia 30 minutes to finish.
She took 90 minutes in all to answer both quizzes.
