angeladahlgren6589 angeladahlgren6589

16-01-2018
Mathematics

contestada

Two planes leave Dallas at the same time. One heads east at a speed of 428 miles per hour. The other plane heads west at a speed of 382 miles per hour. How many hours will it take them to be 2,025 miles apart?

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altavistard altavistard

18-01-2018

Let the # of hrs be h.

Then (428 mph)(h) + (382 mph)(h) = 2025 miles

Solve this for h. Divide (428+382) into 2025: h = 2.5 hours (answer)

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