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chimwim8347
10.08.2019 •
Mathematics
Ted can clear a football field of debris in 3 hours. jacob can clear the same field in 2 hours. when they work together, the
situation can be modeled by the equation, where t is the number of hours it would take to clear the field together.
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Ответ:
1 hour 12 minutes.
Step-by-step explanation:
Let the number of hours = t
Ted can clear the field =![\frac{t}{3}](/tpl/images/0174/0566/bcb09.png)
Jacob can clear the field =![\frac{t}{2}](/tpl/images/0174/0566/b939f.png)
Together they can clear the field =
+
= 1
2t + 3t = 6
5t = 6
t =![\frac{6}{5}](/tpl/images/0174/0566/618fe.png)
t = 1.2 hours.
converting 1.2 hours = 1 hour 12 minutes.
It would take 1 hour 12 minutes to clear the field together.
Ответ:
1/2+ 1/3 = 1/t t= 72 minutes (1 hour and 12 minutes)
Step-by-step explanation:
1/2+1/3 =t
3/6 +2/6= 1/t
5/6 = 1/t
Cross multiplication
5t =6
t=6/5 =1 1/5
1 hour and 1/5 of an hour
60 minutes /5 = 12 minutes
Ответ:
the answer is D
Step-by-step explanation: i just took the test :p