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11 April, 18:16

A mail order catalog lists books for 3x - 5 dollars each. The cost of postage is $2 for 3 books or less. Represent the cost of an order for 5 books.

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  1. 11 April, 21:52
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    the cost of an order for 5 books=15x-21

    Step-by-step explanation:

    a mail order catalog lists books for 3x - 5 dollars each.

    i. e. cost of 1 book=3x-5

    Hence, cost of 5 books=5 * (3x-5) = $ (15x-25)

    also the cost of postage is $2 for 3 books or less.

    as there are 5 books so we have to make two postages.

    Hence, cost of postage for 5 books=$4

    Hence, the total cost of an order of 5 books=15x-25+4

    =15x-21.
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