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March 29, 2017

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Suppose a video store charges nonmembers $4 to rent each video. A store membership costs $21 and members pay only $2.50 to rent each video. How many videos would one need to rent to justify purchasing a membership?

  • algebra - ,

    Let x = number of videos

    21 + 2.5x ≤ 4x

    Solve for x.

  • algebra - ,

    14=X

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