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plshlpme

  • 3 years ago

Jack usually mows his lawn in 5 hrs, marilyn can mow the same yard in 4 hrs. How much time would it take for them to mow the lawn together?

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  1. mrjoselson
    • 3 years ago
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    x/5 + x/4 = 1 20( x/5 +x/4=1) 4x+5x=20 9x=20 x=20/9 = 2.4444444444 hours

  2. 140986
    • 3 years ago
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    Jack will mow 1/4 per hour. Marilyn will mow 1/6 per hour. 1/4 + 1/6 = 3/12 + 2/12 = 5/12 Together they will mow 5/12 per hour. Total hours x mowed per hour = 1 Hours x 5/12 = 1 Hours = 1/(5/12) Hours = 2.4

  3. mrjoselson
    • 3 years ago
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    1/5 not 1/6 but that way will work very well too

  4. 140986
    • 3 years ago
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    sorry my bad.

  5. plshlpme
    • 3 years ago
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    BOTH OF YOU WERE WRONG BUT THANK YOU FOR YOUR EFFORTS

  6. mrjoselson
    • 3 years ago
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    what is the answer plshlpme

  7. plshlpme
    • 3 years ago
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    IT WAS 2 2/9

  8. mrjoselson
    • 3 years ago
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    which is 20/9. I just converted to a decimal instead of a mixed number, sorry

  9. plshlpme
    • 3 years ago
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    ITS OK! :) THANK YOU FOR TRYING.

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