Answer:
D. Children could attend school part of the day and work part of the day.
Explanation:
Children often worked full time jobs rather than attended school, and those that did likely would drop out later to work anyways.
They reduce the time (by making it faster) and reduce the cost of trading (by making it efficient).
<span>The Navajo Code talkers played a critical role during World War II. The members of this Native American group were recruited by the US military as individuals who could relay important battlefield messages without the fear of the message being decoded by the Axis Powers. This was because the Navajo language was very difficult to learn and there were very little written records of this language. This is why the US military recruited this group specifically. Thanks to their service, the US military officers were able to communicate battefield positions of their enemies and ongoing correspondence about the place of their next attack without fear of their enemy breaking their code. </span>
Dr. Jackson supports the biological model that shows how psychological disorders and hormonal imbalance can be inherited through genes. Genetics can open susceptibility through the chemical combinations in the body that can be studied and controlled with proper professional treatment.
Answer:
The answer is B) 7.
Explanation:

The only thing you would have to do is divide each side by 4.

Next cross out like terms and divide where needed.

And there is your answer.
Good Luck. :)