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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?
 one year ago
 one year 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?
 one year ago
 one year ago

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timia618Best ResponseYou've already chosen the best response.0
Solve the following inequality: 2x + 6 ≤ 5x  9
 one year ago

estudierBest ResponseYou've already chosen the best response.0
Pump 1 does 1/9 per hour and Pump 2 does 1/12 per hour
 one year ago

timia618Best ResponseYou've already chosen the best response.0
how many hours then together?
 one year ago

estudierBest ResponseYou've already chosen the best response.0
Work out how much the two are doing per hour together and u can easily get your answer...
 one year ago

timia618Best ResponseYou've already chosen the best response.0
about 5 hours about 5 hours and 10 minutes about 5 hours and 20 minutes about 5 hours and 30 minutes ?
 one year ago

Algebraic!Best ResponseYou've already chosen the best response.0
\[\frac{ 1pool }{ 9 hours }*T hours + \frac{ 1pool }{ 12 hours}*Thours = 1 pool\] t/9 + t/12 =1
 one year ago

Algebraic!Best ResponseYou've already chosen the best response.0
you solved for t and got t=5?
 one year ago

Algebraic!Best ResponseYou've already chosen the best response.0
multiply the whole equation by (9*12)
 one year ago

Algebraic!Best ResponseYou've already chosen the best response.0
yes, multiply the whole equation by 108
 one year ago

Algebraic!Best ResponseYou've already chosen the best response.0
it will be easier for you if you leave 108 as 9*12 , but do it however you like...
 one year ago

timia618Best ResponseYou've already chosen the best response.0
so the answerr is 5hr and 30mns
 one year ago

Algebraic!Best ResponseYou've already chosen the best response.0
what did you get for t?
 one year ago

timia618Best ResponseYou've already chosen the best response.0
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?
 one year ago

satellite73Best ResponseYou've already chosen the best response.0
go right to the answer, no agony \[\frac{9\times 12}{9+12}\]
 one year ago

satellite73Best ResponseYou've already chosen the best response.0
i seriously doubt \[\frac{9\times 12}{9+12}=9\]
 one year ago

timia618Best ResponseYou've already chosen the best response.0
so the answer is 5hrs?
 one year ago
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