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Pre-Algebra

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Mistu purchased a basketball hoop for her driveway from a sporting goods store. After the sales tax rate of 5.5% was applied, the total cost came to $179.35.How much money would Mistu have saved if she had used a coupon good for 10% discount?

  • Pre-Algebra -

    x = orig cost without tax
    0.055x = orig cost with tax
    x + 0.055x = $179.35
    1.055x = 179.35
    x = 170.00 orig cost

    170.00 - 170.00(0.10) = new cost with coupon without tax

    170.00 - 17.00 = 153.00 new cost no tax
    153.00 (0.055)tax = 8.42 tax
    153.00 + 8.42 = 161.42 new total cost

    179.35 - 161.42 = 17.93 savings

    please check

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