The greatest number of blue flowers she can use for each show is 21.
Since Lara is making wreaths to sell at 4 craft shows, and for each wreath, she uses the same number of blue flowers, and she has 7 dozen blue flowers, to determine the greatest number of blue flowers she can use for each show you must perform the following calculation:
Therefore, the greatest number of blue flowers she can use for each show is 21.
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