why would it be Meine instead of Mein?
Because of the plural.
mein Mantel = sing.
meine Mäntel = plur.
Can you please explain, why does it accept "meine frau" for my wife? If Meine is for plural. Thanks!
Meine is for whichever word for which the definitive article is
"die" - so: plural and feminine
Why its wrong when a is without dots ä
dots indicate plural
Why can't i say Meinen Jacken? I get it's jackets vs coats but is it grammatically correct?
I wrote Meine Manteln in error and it was marked correct - "You have a typo". This is not helpful.