destinym2020 destinym2020

26-01-2017
Mathematics

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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.

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texasbreebree texasbreebree

26-01-2017

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

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