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29 March, 16:44

If you spend at least $50 (including shipping) at an online store, you receive a $10 gift card. You want to purchase CDs that cost $12 each. If shipping costs $5, write and solve an inequality to find the number of CDs you must buy to receive the gift card.

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  1. 29 March, 19:03
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    since you need at least fifty dollars, we know that the amount you buy is greater than or equal to fifty

    amt you buy≥50

    in other words:

    number of CDs plus shipping cost≥50

    now, let's call CDs x. if you pay 12 dollars per cd, then we can call the price for a 12x

    12x+shipping≥50

    shipping is $5, so

    12x+5≥50
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