What was the main role of enslaved people in West African societies?

While West Africans made up the vast majority of the enslaved, the east coast of Africa, too, supplied slaves for the trade. In the New World, the institution of slavery assumed a new aspect when the mercantilism system demanded a permanent, identifiable, and plentiful labor supply.

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Explanation:

answer: sorry but maybe take a pic of the map so nobody's confused

explanation:

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69