Learn Spanish (Spain): El restaurante es muy caro y tiene mucho ruido. - The restaurant is very expensive and has a lot of noise.

Muy means "very" and is used before adjectives (describing words like caro, meaning "expensive"). Mucho means "a lot of" or "much" and is used before nouns (things like ruido, meaning "noise") to talk about the amount of something.

Does mucho change its ending depending on the word after it?

Yes! Because ruido is a masculine singular noun, we use mucho. If the noun were feminine, like gente (people), the ending would change to match it: mucha gente. Muy, on the other hand, never changes its form.

Why do we use es instead of está for the restaurant being expensive?

We use es (from the verb ser) to describe traits that define what something is. Being an expensive restaurant is considered a core, lasting characteristic of this place, not just a temporary state.

Why does the sentence say the restaurant "has" noise (tiene mucho ruido) instead of saying it "is" noisy?

In Spanish, it is very common to use the verb tener (to have) with a noun to describe a condition. Just like a person "has hunger" (tengo hambre), a place "has noise" (tiene mucho ruido) instead of saying it "is noisy".