'how many brothers do you have?'
"Il y a combien d'habitants" is French for "how many inhabitants are there." It is a question inquiring about the population of a place.
It means- How many sisters does Gabrielle have
There is no such word in French. If you mean "explorer", it is French for "to explore". If you mean the English noun "explorers", the French translation is "explorateurs".
Tisha doesn't mean anything in French.
'You are French'. If there is a question mark on the end, it would mean 'You are French?' or 'Are you French?'
combien means how much / how many in French.
combien pèses-tu means 'how much do you weigh' in French.
Ca coute combien ? means How much is it?
The question 'C'est combien?' means How much is this? In the word-by-word translation, the demonstrative pronoun 'ce'* means 'this'. The verb 'est' means '[he/she/it] is'. And the adverb 'combien' means 'how much, how many'. *The letter 'e' is dropped in front of a word that begins with a vowel or an unaspirated 'h'.
"Combien est-ce que tu pèses" or "Combien pèses-tu". They both mean the same, although the former is used more often.
"Combien de fromages ?" : How many cheeses ?
Not quite certain, but I think it means "Room Number 627"
How many French teachers there are in the class
combien de temps avez-vous été en Amérique ? means 'how long have you been in America?' in French.
How much/ what price
basically, "how long have you studied French?"
"combien d'élèves parlent" means "how many pupils are speaking"