What places did Francisco Vasquez explore in America

What was a major failing of the united states government under the articles of confederation?

How did the economic impacts of the great depression differ in the united states and in the soviet union?

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