Answer:
C or a
Step-by-step explanation:
A.) associative property
13/6 or 2.1666666666... or 2 1/6
n+ 3n+2 +5n-6 = 41
9n-4=41
9n=45
n=5
side 1 =5
side 2= 17
side 3 =19
Hope this helps! :)
Hope it helps you!.....
663 and 366 are both right