What challenges did the Aztecs face when they settled in the valley of Mexico?

What kind of organizations are supported by economic interest groups? a. civil rights organizations b. professional organizations c. womens' rights organizations d. business and trade organizations

Debris tossed into the atmosphere by a meteorite impact can cause greenhouse warming true false

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