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8 March, 19:13

You are trying to save $20 a week to buy and use cd player. During the last 4 weeks you have saved $35, $15, $10 and $12. How much do you need to save this week to average $20 for the 5 weeks.

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  1. 8 March, 23:11
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    (35+15+10+12+x) / 5=20

    (72+x) / 5=20

    72+x=20 * 5

    72 + x = 100

    x = 100 - 72

    x = 28$ do you need to save this week
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