Describe three ways in which the plains indians used the buffalo and then describe how the introduction of the horse changed their lives. will give !

The three ways that the Indians that lived on the Great Plains used the buffalo are:

- Food source; the buffalo meat was essential for the survival of the Indians from the Great Plains, it was their prime food source, and since there were buffalo's in abundance they used it in their favor.

- Clothing material; the fur of the buffalo is very thick and warm, so it was used for making warm and cozy clothes, and its skin was used as well for making shoes or lighter clothes.

- Tools, weapons, jewelry; the bones of the buffalo were used for multiple reasons, for making weapons, tools that were needed in the daily life, jewelry etc.

The introduction of the horse to the Indians changed their hunting technique, their battle tactics, and their daily lives in general. The horse was used for hunting buffalo, which increased the efficiency and safety in the hunting. Horses were used for transportation and travel, which enabled them to do things much quicker and easier, and also they were used in battles in a similar manner like the nomadic people form Central Asia.

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation:

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13