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Help please!!!!!!!!!! Need ASAP!! Thank you!

Maria can stuff envelopes twice as fast as her friend James. Together they can stuff 6750 envelopes in 4.5 hours. How long would it take each of them working alone? Which of the following equations could be used to solve this problem?

Help please Need ASAP Thank you Maria can stuff envelopes twice as fast as her friend James Together they can stuff 6750 envelopes in 45 hours How long would it class=

Respuesta :

taniaj1019

I thinks it's the last one

hope this helps

mhanifa

Answer:

  • B. 4.5/t + 4.5/(2t) = 1

Step-by-step explanation:

  • Work = rate*time
  • Maria's rate = 6750/t
  • James's rate = 6750/2t

Their rate when working together:

  • 6750/t + 6750/(2t) = 6750/4.5 ⇒
  • 1/t + 1/(2t) = 1/4.5 ⇒
  • 4.5/t + 4.5/(2t) = 1

Correct choice is B