The Neolithic Era is characterized by which of the following? A. Human societies relying on hunting and gathering for food
B. Human societies developing permanent farming communities
C. Human societies becoming more isolated from one another
D. Human societies developing the first stone and wood tool

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the president, prime minister, chief justice, speakers and ministers take their oath of office. the oath is taken in bengali

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

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.