Why not? Because every math system you've ever worked with has obeyed these properties! You have never dealt with a system where a×b did not in fact equal b×a, for instance, or where (a×b)×c did not equal a×(b×c). Which is why the properties probably seem somewhat pointless to you. Don't worry about their "relevance" for now; just make sure you can keep the properties straight so you can pass the next test. The lesson below explains how I kept track of the properties.
Answer:
Yes
Step-by-step explanation:
Answer:
0.1
Step-by-step explanation:

Answer:
x=-13 The solution is in the picture above. if you need more solutions let me know. :)