Spanish language Q&A Forum

In the last section of the translation, "between the practical, incredulity and mysticism" is translated as "entre lo práctico, la incredulidad y el misticismo."  I don't understand why the práctico gets lo as it's article (other than because the hint said so).  Can you explain, please.  Thanks

When do you and when you don't use el/la/los/las?

I'm totally confused by this and always end up making the wrong choice. 

Not a question, but I think a much better way to put this would be ú -> ue, meaning the "u" becomes "ue" when stressed. That holds across all tenses (also for voseo) and needs no special cases at all (assuming the usual ge -> gue to keep the g sound from getting mangled). Turns it into a single simple fact to remember.

Accent should be on the a in cuál, not the u.

Que Onda

This is one of the nuances of usted that I still haven't quite figured out. At my retail job, I often assist Spanish-speaking customers. However, I am not sure if these situations warrant using more formal language. In English, I address my customers politely with "Sir" or "Ma'am" but the language I use otherwise as I'm assisting them is more informal. I want to maintain the same tone of politeness yet casualness in Spanish as English but I don't know if it comes across as too formal. For context, I am in my early twenties and the customers I've spoken to are almost always older than me ranging from their thirties to more elderly people. Obviously, for my older customers, I would use usted but would it be necessary to use usted for people who are not that much older than me? I don't know if there is anybody here who can shed some light on this topic. In Spanish-speaking countries do retail employees typically address their customers with more formal, usted language?

Thank You

Nathan

Regarding the hints in the tests. Sometimes the hint says to conjugate in "El pretérito Perfecto Compuesto" and other times just "El pretérito Perfecto". If I enter El pretérito Perfecto simple it's incorrect. The study buttons take you to the same lesson, and seem to be asking for the same answer, am I missing something?

Can I say in the following ? 1. No es mi culpa, 2. ha sido su culpa 3. Es culpa de Juan, 4. No tengo culpa 

1. Qué música te gusta más?

What music do you like the most?

2. Cuál universidad es mejor?

Which university is better?

Is Qué + noun used when the universe to chose from is large?

Is Cuál + noun used when the universe to chose from is small?

Would you say Cuál universidad es más mejor or Qué universidad es más mejor?

Which university is the best?