Questions & Answers about Las amigas son jóvenes y felices.
Since amigas is feminine, why aren't the adjectives feminine (like jóvenas or felizas)?
The singular word is feliz. Why is it spelled felices here?
Why does jóvenes have an accent mark when the singular word joven doesn't?
Why do we use son (from ser) instead of están (from estar) for being happy?