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Mathematics, 06.07.2021 05:20 krisgrace1485

Lisa drove 80 miles, then increased her speed by 20 miles per hour for 180 miles. If the second part of the drive took 1 hour longer than the first part, find her average speed.

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Lisa drove 80 miles, then increased her speed by 20 miles per hour for 180 miles. If the second part...
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