By the early 1500s, what did the Aztecs become because it covered 80,000 square miles that stretched from central Mexico to the Atlantic & Pacific and contained 30 provinces that were ruled by an emperor?

The most powerful empire.

Explanation:

Originally the Aztecs actually are from the Northern part of Mexico before they later were in charge of the central part of Mexico. The Aztecs speak a language which is known as the Nahuatl.

For Aztecs, they are known as the Mexica or Tenochca. They were able to efficiently control the regions such as the central Mexico, Atlantic and Pacific and other thirty (30) provided because they formed an alliance which is known as the Tripple Alliance.

the answer is suffrage