Consider: One way of finding !PS is: !PS = !PR + !RS = (a + b) + c. Use the diagram to
Chapter 12, Problem 4(choose chapter or problem)
Consider: One way of finding !PS is: !PS = !PR + !RS = (a + b) + c. Use the diagram to show that (a + b) + c = a + (b + c).
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