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30 October, 09:58

The U. S. Post Office charges 40 cents for the first ounce and 25 cents per ounce for each additional ounce. Use an inequality to find the number of whole ounces that can be mailed for no more than $4.00.

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  1. 30 October, 10:04
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    15 ounces.

    Explanation:

    The first ounce is worth 0.40, and the additional x ounces are worth 0.25 each. So, the inequality should be Y > A + B * X, where Y is equal to 4, A is the value of the first ounce (0.4), B is the value of the additional ounces (0.25) and x is the quantity of additional ounces.

    4 > 0.4 + x * 0.25 4 - 0.4 > 0.25x 3.6/0.25 > x 14,4 > x

    14 is the maximum of additional ounces that can be mailed, we have to add the first one, for a total of 15 whole ounces that can be mailed for no more than $4.
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