"Metal is important and useful but it is expensive."

Translation: Tá miotal tábhachtach agus úsáideach ach tá sé costasach.

[djzeus01]

Not sure Duolingo taught the word "daor," but is there any other reason that wouldn't be appropriate here?

[galaxyrocker]

No. It should be accepted as well.

[deactivated user]

Why isn't "Is tábhachtach agus úsáideach é miotal ach is daor é" acceptable?

[Sean92256]

Why not "an miotal" here? We are using the word "metal" in a general sense.