Hold'em table

9c4c offsuit is a weak hand not worth opening from the button in a 3-handed game; folding preserves chips.

A9 offsuit is strong enough to raise blind versus blind. Raising to 3 big blinds pressures the big blind's wide range and builds value while accounting for being out of position.

JJ is a strong hand; 3-betting heads-up against a single raiser builds value and denies cheap equity.

A9 offsuit is vulnerable to domination and realizes equity poorly out of position against a three-bet. Without evidence that the big blind is reraising unusually wide, folding is preferable to calling or four-betting.

QJo is a clear button open three-handed. Raising to 2.5 big blinds applies pressure to the blinds while preserving positional advantage if called.

76o from SB facing a raise is a weak holding not worth continuing against a button open; folding preserves chips for better spots.

K5 offsuit is too weak to continue against a 2.5x raise out of position; folding preserves chips for better spots.

3d9h offsuit is a weak hand not worth calling from the button in a 3-handed pot facing a raise-sized call.

8s4s from the small blind is too weak to call into a raisable spot; folding saves chips for better hands.

JTs is a strong suited connector on the button; raising for value and position with a standard 3x open.

A6 offsuit is too weak to continue profitably from the small blind against a 3bb open with the big blind still to act. Folding avoids playing a frequently dominated hand out of position.

76o facing a 3x button raise with only one caller folded is weak and not worth defending out of position for 200 more; fold to preserve chips.

K9 offsuit is strong enough to open on the button three-handed. Raising to 2.5 big blinds pressures the blinds while retaining positional advantage if called.

5-9 offsuit is weak; facing a raise with a mediocre hand isn't worth continuing.

AKo is strong enough to 3-bet for value against the button's 2.5x open; building the pot while keeping range advantage.

K9 offsuit is a weak defense against a big-blind three-bet, even in position, because it is often dominated and realizes equity poorly. Folding avoids committing more chips with a marginal hand.