Hold'em table

9♣4♣ is a weak, poorly connected hand and a marginal button open with both blinds still to act. Folding avoids investing in a low-value holding without information that the blinds overfold.

Heads-up vs big blind with Ace-high, button folded, a standard raise builds the pot with a decent hand.

Pocket jacks are a strong value three-bet against a small-blind opening range. Raising to 1,000 builds the pot with a likely equity advantage while charging weaker hands to continue.

A9o out of position facing a sizeable 3-bet is not strong enough to continue profitably; folding preserves chips for better spots.

QJ offsuit on the button is a solid raising hand heads-up against blinds; raise to 300 to build the pot and take initiative.

76 offsuit is too weak to defend against a 3bb button raise from the small blind. Calling leaves us out of position with the big blind still able to reraise, while a bluff raise lacks useful blockers.

K5 offsuit is far too weak to call a 3x raise out of position; folding is clearly best.

Nine-three offsuit is too weak to open profitably against two opponents without evidence that they overfold. Folding avoids investing chips with poor equity and playability.

JTs is a decent suited connector on the button; a small raise builds the pot with position while keeping the range wide.

Seven-six offsuit is a marginal defend against a 3-big-blind raise and realizes equity poorly out of position. Without evidence of an unusually wide opening range, folding is preferable.

K9 offsuit on the button is a reasonable raising hand; raising to isolate and take advantage of position against the blinds.

Nine-five offsuit is too weak to defend against a button raise from the small blind, especially with the big blind still to act. Folding avoids investing more chips with poor equity realization out of position.

AKo is a premium hand; I 3-bet for value and to build the pot against the opener rather than just calling.

K9o is too weak to continue against a 3-bet; folding preserves chips for better spots.