4 types of northern african houses

Explanation: African houses are often cylindrical (round) in shape. The Xhosa people of southern Africa build round one-room houses called rondavels. A rondavel is typically made from a ring of timber posts, filled in with mud or basket weave, and topped with a conical thatched roof.

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4

answer(c) carved on a babylonian clay tablet that showed earth as a flat circular disk;