Answer:

Step-by-step explanation:
This shows the correct way to use the <em>Associative</em><em> </em><em>Property</em><em> </em>because there are GROUPING SYMBOLS wrapped around UNIQUE parts of each expression, and STILL gets the exact same result.
I am joyous to assist you anytime.
Answer:
I think its D sorry if I get it wrong
Step-by-step explanation:
Answer:
x=4
Step-by-step explanation:
If you want the answer to be 60 you could put 30+30=60