AdrienVallentino2047 AdrienVallentino2047

22-09-2017
Mathematics

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Mr. Brown can grade 4 exams in 15 minutes. How many exams can he grade in 1 hour? How do you know?

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sylandsyl sylandsyl

22-09-2017

16 because you divide i hour by 15 and multiply that by 4:)

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22-09-2017

4:15
1:.15
X:1H
16:1H

This is because 15x4=1hour and 4x4=16

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solve for x 8x-15=17

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