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Dean took a total of 15 quizzes over the course of 3 weeks. How many week of school will Dean have to attend this quarter before he will have taken a total of 20 quizzes? Solve using unit rates

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marcthemathtutor

Answer:

4 weeks

Step-by-step explanation:

15 quizzes -----> 3 weeks

1 quiz-------> 3/15 = 1/5 week

hence the unit rate is 1/5 week per quiz

20 quizzes ----> 1/5 weeks per quiz x 20 quizzes = 4 weeks

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