Answer:
We use it when the last letter of the word that connects to another ends with i or y, so it doesn't sound bad.
Explanation:
Example: Hoy e inicié mis clases.
The same goes for the o, or u. The reason why "u" is used instead of "o" is to avoid a cacophony, which also occurs when saying "o ocho"
It is only to avoid repeating the vowels.
The only difference<span> is whether you are speaking informally or formally.</span>
El Paso–Juárez, also known as Juárez–El Paso, the Borderplex or Paso del Norte, is a binational metropolitan area, or conurbation, on the border between Mexico and the United States.
