Hold'em table

K8o on the button in a 3-handed game is a reasonable steal/raise hand; a standard open-size raise applies pressure on the blinds.

T9s is playable three-handed against a 2.5bb button open, and calling 200 into 400 keeps the hand cheap enough to realize suited connectivity.

Middle pair with a weak kicker on an ace-high flop, out of position against the preflop raiser. Checking keeps the pot small and avoids building a pot I am often behind in.

Continuation bet on a scary ace-high board to leverage preflop aggression and fold out missed hands, with backdoor flush equity as a bonus.

Middle pair of nines gets 3:1 against a half-pot c-bet, so calling is better than folding or raising with limited improvement potential.

I have nines and sevens, but any ace makes a better two pair and the opponent has been aggressive, so I check to keep the pot small and realize showdown value out of position.

I hold a strong backdoor flush draw (any heart makes the nut flush) plus overcard equity, and my opponent's passive check-call line suggests weakness, so a semi-bluff bet builds fold equity while retaining strong draw equity if called.

93 suited is too weak to open from the button for a full big blind; folding avoids a dominated, low-equity spot.

Queen-five offsuit is too weak to invest from the small blind against the big blind; folding preserves chips for better spots.

Pocket queens on the button is a premium hand; I raise for value and to build the pot against the blinds.

6-2 offsuit is a trash hand facing a raise; folding is clearly correct.

K7o is too weak to call a button open out of position, and it is a poor three-bet bluff. Folding avoids a dominated, hard-to-play spot.

Qc2s is a weak offsuit hand with no button-limp incentive since I'd be first to act with two players behind still to act; folding preserves chips.

65o is too weak to complete from the small blind; folding avoids putting more chips in with a dominated, low-equity hand.

Q9 suited is a standard button open; raising to 2.5bb builds the pot and takes the initiative rather than limping.

9s4d is a very weak hand out of position against a button raise; folding loses only the 50 chip blind and avoids a dominated spot.

J9o is marginal but the price is cheap to defend my big blind against a single raiser with one fold already in.

I have an open-ended straight draw (need a 6 or 10) with 9-J on a 4-7-8 board, so a semi-bluff lead builds the pot and can win immediately if the button doesn't have a strong hand.

Q9 has only two overcards and no draw on 4-7-8, so it is behind a donk-betting range and does not have the equity to call 350 into 900.

Queen-four offsuit is far too weak to play even from the button in a 3-handed game; folding preserves chips for better spots.

T4o offsuit is weak, and with a call needed just to see a flop heads-up against BB with no fold equity here, it's better to give up the small blind rather than invest more chips.