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timia618

  • 3 years ago

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?

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  1. timia618
    • 3 years ago
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    Solve the following inequality: 2x + 6 ≤ 5x - 9

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

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

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

  5. timia618
    • 3 years ago
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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 ?

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

  7. Algebraic!
    • 3 years ago
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    solve for t

  8. timia618
    • 3 years ago
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    5 hours?

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

  10. timia618
    • 3 years ago
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    idk

  11. timia618
    • 3 years ago
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    how do i get the t?

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

  13. timia618
    • 3 years ago
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    108

  14. Algebraic!
    • 3 years ago
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    yes, multiply the whole equation by 108

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

  16. timia618
    • 3 years ago
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    so the answerr is 5hr and 30mns

  17. Algebraic!
    • 3 years ago
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    what did you get for t?

  18. timia618
    • 3 years ago
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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?

  19. anonymous
    • 3 years ago
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    go right to the answer, no agony \[\frac{9\times 12}{9+12}\]

  20. timia618
    • 3 years ago
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    so its 9

  21. anonymous
    • 3 years ago
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    i seriously doubt \[\frac{9\times 12}{9+12}=9\]

  22. timia618
    • 3 years ago
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    i got 5.1428567143

  23. timia618
    • 3 years ago
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    so the answer is 5hrs?

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