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Mathematics, 12.09.2019 04:30 thedocgalloway

It took fran 1.8 hours to drive to her mother's house on saturday morning. on her return trip on sunday night, traffic was heavier, so the trip took her 2 hours. her average speed on sunday was 6 mph slower than on saturday. what was her average speed on sunday?

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It took fran 1.8 hours to drive to her mother's house on saturday morning. on her return trip on sun...
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