anonymous
  • anonymous
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?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Solve the following inequality: 2x + 6 ≤ 5x - 9
anonymous
  • anonymous
Pump 1 does 1/9 per hour and Pump 2 does 1/12 per hour
anonymous
  • anonymous
how many hours then together?

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More answers

anonymous
  • anonymous
Work out how much the two are doing per hour together and u can easily get your answer...
anonymous
  • anonymous
about 5 hours about 5 hours and 10 minutes about 5 hours and 20 minutes about 5 hours and 30 minutes ?
anonymous
  • anonymous
\[\frac{ 1pool }{ 9 hours }*T hours + \frac{ 1pool }{ 12 hours}*Thours = 1 pool\] t/9 + t/12 =1
anonymous
  • anonymous
solve for t
anonymous
  • anonymous
5 hours?
anonymous
  • anonymous
you solved for t and got t=5?
anonymous
  • anonymous
idk
anonymous
  • anonymous
how do i get the t?
anonymous
  • anonymous
multiply the whole equation by (9*12)
anonymous
  • anonymous
108
anonymous
  • anonymous
yes, multiply the whole equation by 108
anonymous
  • anonymous
it will be easier for you if you leave 108 as 9*12 , but do it however you like...
anonymous
  • anonymous
so the answerr is 5hr and 30mns
anonymous
  • anonymous
what did you get for t?
anonymous
  • anonymous
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?
anonymous
  • anonymous
go right to the answer, no agony \[\frac{9\times 12}{9+12}\]
anonymous
  • anonymous
so its 9
anonymous
  • anonymous
i seriously doubt \[\frac{9\times 12}{9+12}=9\]
anonymous
  • anonymous
i got 5.1428567143
anonymous
  • anonymous
so the answer is 5hrs?

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