Lupe, Rosa y Tomás son amigos. (bueno)

Is it supposed to be buen or buenos in the empty spot? I know that an adjective is supposed to be shorted before a noun-buen but how about for plural nouns?

4 answers

I'll send this to our Spanish expert, SraJMcGin.
The adjective is shortened to buen before a masculine singular noun - buen hombre, buen libro
Otherwise it has the same number (singular/plural) and gender (masculine/feminine) as the noun(s) modified. buenos amigos, buenas amigas, buena chica, etc.

Sra
Gracias, Senora!
de nada
There are other adjectives that work like bueno. They are uno, malo, primero, tercero, alguno, ninguno.

Sra