Answer:
Prehistory is the time before written records.
Explanation:
Answer:
The answer is below
Explanation:
The distance between two points A(x₁, y₁) and B(x₂, y₂) on the coordinate plane is given by:

a) Distance between (-3, 1) and (5, 4)

b) Distance between (2, 3) and (4, 5)

c) Distance between (-5, 7) and (8, 5)

d) Distance between (-2, 4) and (3, -1)

1890, the first zipper was invented but there wasn't a price because the guy who invented it was a simple man at the fair. The only price for I zipper I found was in 1930 which was riced at $1.39. Hope this helped. :)