The four books had an average of 341 pages
Step-by-step explanation:
Given
Total number of books = 4
Pages in first book = x1 = 326
Pages in second book = x2 = 288
Pages in third book = x3 = 349
Pages in fourth book = 401
The average is given by:

The four books had an average of 341 pages
Keywords: Average, Division
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Answer:
It should be 5x-6y=30
Step-by-step explanation:
It is the fourth one because n could be any number on that red line because it’s is greater than -3