Answer:
The file will contain excel spreadsheets.
Explanation:
If you receive an .xlsx file it means that this is a file extension, more specifically of excel format.
We must remember that before the year 2007, the excel files only had the extension .xls,<u> so this file will be a later version that year.
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What will contain this file are spreadsheets, which are useful for<u> creating formulas, arithmetic operations, formatting tables, columns, etc.
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To open this file you must have Microsoft Excel installed.