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timia618 Group Title

Pump 1 can empty a pool in 9 hours while Pump 2 can empty the same pool in 12 hours. If the two pumps worked together, how long would it take them to empty the pool?

  • 2 years ago
  • 2 years ago

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  1. timia618 Group Title
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    Solve the following inequality: 2x + 6 ≤ 5x - 9

    • 2 years ago
  2. estudier Group Title
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    Pump 1 does 1/9 per hour and Pump 2 does 1/12 per hour

    • 2 years ago
  3. timia618 Group Title
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    how many hours then together?

    • 2 years ago
  4. estudier Group Title
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    Work out how much the two are doing per hour together and u can easily get your answer...

    • 2 years ago
  5. timia618 Group Title
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    about 5 hours about 5 hours and 10 minutes about 5 hours and 20 minutes about 5 hours and 30 minutes ?

    • 2 years ago
  6. Algebraic! Group Title
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    \[\frac{ 1pool }{ 9 hours }*T hours + \frac{ 1pool }{ 12 hours}*Thours = 1 pool\] t/9 + t/12 =1

    • 2 years ago
  7. Algebraic! Group Title
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    solve for t

    • 2 years ago
  8. timia618 Group Title
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    5 hours?

    • 2 years ago
  9. Algebraic! Group Title
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    you solved for t and got t=5?

    • 2 years ago
  10. timia618 Group Title
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    idk

    • 2 years ago
  11. timia618 Group Title
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    how do i get the t?

    • 2 years ago
  12. Algebraic! Group Title
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    multiply the whole equation by (9*12)

    • 2 years ago
  13. timia618 Group Title
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    108

    • 2 years ago
  14. Algebraic! Group Title
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    yes, multiply the whole equation by 108

    • 2 years ago
  15. Algebraic! Group Title
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    it will be easier for you if you leave 108 as 9*12 , but do it however you like...

    • 2 years ago
  16. timia618 Group Title
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    so the answerr is 5hr and 30mns

    • 2 years ago
  17. Algebraic! Group Title
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    what did you get for t?

    • 2 years ago
  18. timia618 Group Title
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    A plane traveling from Dallas to New York with a tailwind of 30 miles per hour takes 4.5 hours. Returning with the headwind, it takes the same plane 5 hours. What is the average speed of the plane in calm conditions? A plane traveling from Dallas to New York with a tailwind of 30 miles per hour takes 4.5 hours. Returning with the headwind, it takes the same plane 5 hours. What is the average speed of the plane in calm conditions?

    • 2 years ago
  19. satellite73 Group Title
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    go right to the answer, no agony \[\frac{9\times 12}{9+12}\]

    • 2 years ago
  20. timia618 Group Title
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    so its 9

    • 2 years ago
  21. satellite73 Group Title
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    i seriously doubt \[\frac{9\times 12}{9+12}=9\]

    • 2 years ago
  22. timia618 Group Title
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    i got 5.1428567143

    • 2 years ago
  23. timia618 Group Title
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    so the answer is 5hrs?

    • 2 years ago
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