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Mathematics, 25.07.2019 15:00 plssshelp

Aflight across the us takes longer east to west than it does west to east because of the plane having a headwind flying westward and a tailwind flying eastward. suppose you are flying from philadelphia, pa to san diego, ca. the distance between the cities is 3870 kilometers and the plane's speed in 725 km/r. what is the speed of the wind?

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