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1 January, 18:50

Kyle and his brother Joel leave a rest stop at the same time traveling in opposite directions. After traveling for 6 hours, they are 780 miles apart. If Kyle drives 10 miles per hour faster than Joel, how fast was Joel traveling? Kyle and his brother Joel leave a rest stop at the same time traveling in opposite directions. After traveling for 6 hours, they are 780 miles apart. If Kyle drives 10 miles per hour faster than Joel, how fast was Joel traveling?

If anyone could explain, that would be great.

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  1. 1 January, 18:52
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    Kyle's speed is represented by variable k.

    Joel's speed is represented by variable j.

    Kyle is 10 mph faster.

    k = j+10.

    Driving in opposite directions after 6 hrs, they are 780 mi apart.

    6j + 6k=780

    Substitute for k

    6j + 6 (j+10) = 780

    6j+6j+60=780

    12j+60=780

    12j=720

    j=60

    Final answer: Joel was travelling 60 mph
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