The equation (5 # 6) # 7 = 5 # (6 # 7) demonstrates the
Chapter 5, Problem 5.1.407(choose chapter or problem)
The equation (5 # 6) # 7 = 5 # (6 # 7) demonstrates the property of multiplication.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer