Which statements describe aspects of the Aztec's civilization? Choose all answers that are correct.

A predicted eclipses and developed a 365-day calendar

B communicated using runners from the capital city of Cuzco

C capital city with a population larger than any European city of the time

D practiced human sacrifice to keep Huitzilopochtli strong

At the time of the brown v. board of education decision,schools were segregated everywhere in the country.several states had laws requiring segregated schools.schools in nearly every state has been desegregated.segregation was common in the north, but not in the south.

In the united state, a system for interaction between unmarried men and woman that casual dating with the purpose of marriage was called

Which effect did the united states supreme court's decision in plessy v. ferguson have? 1. ending segregation in all public schools in america 2. protecting voting rights for african americans by eliminating literacy tests 3. upholding the rights of all citizens to be treated equally by the government 4. authorizing the system that kept black and white people separated