Holdem table

QJs suited is a strong button open; a 3x raise builds the pot and takes the initiative before the blinds.

J7s is a weak offsuit hand facing a 3bb raise from the button with a player still behind; calling out of position with poor equity is -EV. Folding preserves chips for better spots.

Offsuit 7-T is weak, facing a raise with a player already folded; not worth calling from BB with poor equity and no position.

Ace-jack suited-ish strength from the button in 3-handed play is a clear open-raise; I'll take the initiative and build a pot with position.

K3o offsuit from the small blind facing a 3x button raise is too weak to continue profitably; folding preserves chips.

Q7o is too weak to continue out of position against a button open; calling or 3-betting would be -EV.

K4 offsuit is weak from the button facing a call; not worth continuing in a 3-handed pot.

Pocket sevens is ahead of the big blind's range heads-up after the button folds, so I raise to 300 for value and to take the initiative.

Queen-nine offsuit is too weak to call a 3x raise out of position heads-up; folding preserves chips for better spots.

68o is too weak to open even from the button in a 100bb three-handed pot; folding avoids a dominated, low-equity spot.

Pocket queens are a strong hand heads-up against the BB; raising for value builds the pot and can win it preflop or set up a favorable postflop spot.

Q3 offsuit is weak against a raise; folding is cheap and preserves chips heads-up against a likely stronger range.

Jack-four offsuit is one of the weakest hands and flops poorly, often dominated when it hits top pair. Even for just one big blind in position, folding is close to equilibrium and avoids reverse implied odds in a possible multiway pot.

Heads-up vs BB with weak offsuit 86, folding is cheap and avoids playing a bad hand out of position postflop.

Suited connector on the button with no prior raises; standard open-raise to build pot with position and apply pressure on both blinds.

23 suited is too weak to continue out of position against a button raise, so folding avoids a dominated spot.