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f one pump can inflate an air mattress in 21 minutes and a second pump can inflate the same mattress in 42 ​minutes, find the amount of time that would be needed for the two pumps working together to inflate the mattress.

Respuesta :

starandjaiden

Answer:

14 minutes

Step-by-step explanation:

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Well, what I do for these problems is do 1/x with x being the amount of time given.

1/21+1/42=3/42

3/42=1/14

Together, they would take 14 minutes!

(っ◔◡◔)っ ♥ Hope this helped! Have a great day! :) ♥

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