Let's say that you are sitting down to play a game of one-deck blackjack, in which the dealer is presumed not to have a blackjack while hitting on a soft 17, if he has a 9 and you have a 9 and 2, it would be preferable for you to double down.
In case it's likely the dealer didn't get a blackjack while playing with two decks, and that he is also standing on a soft 17, if he has a 7 and you have an 8 and 6, you should hit.
Assuming the dealer doesn't have a blackjack and that he stands on a soft 17, while playing with one deck, if he has an Ace and you have a 9 and Ace, your best option would be to stand.
Aces and Faces Video Poker All information about aces and faces video poker. Learn more about aces and faces video poker. http://www.video-poker.org/aces-faces-video-poker.html
