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11-04-2018
Mathematics

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Marissa wants to buy a DVD player that runs for at least 150 dollars she already saved $80 and plans to save an additional $10 each week run in quality that represents this

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12-04-2018

Price of DVD player ≥ $150
Saved = $80
Amount needed = $150 - $80 = $70
Saving per week = $10

Let x be the number of weeks needed:
80 + 10x ≥ 150
10x ≥ 150 - 80
10x ≥ 70
x ≥ 70 ÷ 10
x ≥ 7

Answer: She needs to save for for at least 7 weeks.

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