Chances are a call center will rarely receive *exactly* 1000 calls, or 1500, or 2000, ...
A more likely choice would be, for instance,

,

, ...
The expression that represents the cost of y books is 12y + 3.
Given that,
- The charge for the first copy of the book is $15.
- For each extra copy, the charge is $12.
- Here we assume the number of books be y.
Now based on the above information, the expression should be
= 12y + (15 - 12)
= 12y + 3
Therefore we can conclude that option F is correct.
Learn more: brainly.com/question/13910351
Answer:
commutative property
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