Final answer:
To select a book with x pages so that Guillermo can complete the book within 6 or fewer days, the inequality x ≤ 132 should be used.
Step-by-step explanation:
To select a book with x pages so that Guillermo can complete the book within 6 or fewer days, he needs to find an inequality that represents the number of pages he can read in 6 or fewer days. We know that Guillermo can read a maximum of 22 pages in 1 day. So, in 6 days, he can read a maximum of 6 * 22 = 132 pages.
In order to select a book with x pages that Guillermo can complete within 6 or fewer days, the inequality should be x ≤ 132. This inequality ensures that Guillermo can finish the book within or in fewer than 6 days.