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you purchase a cell phone for $125. The value of the cell phone decreases by about $20 annually. write a function that models the value of the cell phone over time. then find the value of the cell phone
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you purchase a cell phone for $125. The value of the cell phone decreases by about $20 annually. write a function that models the value of the cell phone over time. then find the value of the cell phone after 3 years.

User Melonie
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y=125-20x ; the value of the cell phone after three years is $65.
User DoubleDouble
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