You use expressions such as `I bet,' `I'll bet,' and `you can bet' to indicate that you are sure something is true. [informal] I bet you were good at games when you were at school. I'll bet they'll taste out of this world. See full dictionary entry for bet.

The term bet can be used in a few different ways on social media but generally means agreed or okay. For instance, someone might say, Want to grab lunch later?  and the other person responds, Bet . It can also be used as a shorthand to mean you can count on it  or trust me. 

The truth is that there is no trick to slot machines. They provide random results based on set mechanics and it all comes down to luck. With that being said, not all games are the same, so picking the right options is key, and you can still change the size of the bet throughout the session for better results.

Yes it's predetermined. The picking of symbols makes no difference except that the guest feels like they have control.