Grade Practice Test | Lumos Learning

Two third grade classes are lined up outside. One class is lined up in 3 rows of 7. The other class is lined up in 4 rows of 5. How many total third graders are lined up outside?

Jessica earns 10 dollars per hour for babysitting. She has saved 60 dollars so far. How many more hours will she need to babysit to buy something that costs 100 dollars?