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star296
17.04.2020 •
Mathematics
After breakfast, David started driving to his uncles town, which was 535 miles away. He drove at an average speed of 60 miles per hour before taking a lunch break exactly at noon. After the lunch break, his average speed was 50 miles per hour. The total driving time was 10 hours . At what time did david leave his home
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Ответ:
Where N = notebooks bought and C = total cost