Audiophile

What property is used for these problems? I believe it is the commutative property for at least the first one. n/-3 + 5 > 4 and 3a - 4 < 5 (The less than sign for the second problem is underlined.

I already had the answer for that one, but thank you for helping me understand it better! Following those steps, I'm supposing the answer to the second one is a ≤ 3?

I believe it leads to an increase for both heat and kinetic energy... However I am not sure. Perhaps this will help? I understand you need the answers fast, so you can just look through this. "When the temperature of an object increases, the average kinet...