A. Identify a Native American civilization of Mexico prior to 1518 and explain one factor that enabled it to rise to a population of 25 million.

B. Identify and explain ONE factor which would explain the demographic change seen in this chart between 1518 to 1593.

C. Identify and explain a social OR cultural effect of the Spanish conquest of Mexico for Native Americans AFTER 1593.

d. william mckinley's southern upbringing him win.

8 - (2a + 7) = a + 40     distribute/multiply - into (2a + 7)

8 - 2a - 7 = a + 40

1 - 2a = a + 40       add 2a on both sides

1 = 3a + 40         subtract 40 on both sides

-39 = 3a       divide 3 on both sides

-13 = a

[proof]

8 - (2a + 7) = a + 40

8 - (2(-13) + 7) = -13 + 40

8 - (-26 + 7) = 27

8 - (-19) = 27

8 + 19 = 27

27 = 27

is this like a kind of true or false question?