According to the map, which statement is correct? In 1850, the Midwest contained areas which had 18-45 inhabitants per square mile.

In 1790, the Southeast contained areas in which 90 or more inhabitants per square mile lived.

From 1790 to 1850, the population decreased in the Northeast.

in 1850, the Midwest contained areas which had 18-45 inhabitants per square mile

it's the first option

Explanation:

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regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.