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26-09-2017
Mathematics

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According to the U.S. Geological Survey, the Mississippi River is 200 mi shorter than the Missouri River. Together, they cover a total of 4880 mi. Find the lengths of each river.

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liemonder liemonder

26-09-2017

I: missouri=mississippi+200
II: missouri+mississippi=4880

-> substitute missouri with mississippi in II:
mississippi+200+mississippi=4880
2*mississippi=4680
mississippi=2340 mi

-> insert in I to calculate missouri:
missouri=2340+200=2540 mi

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