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10 March, 08:23

The equation y=4x+4 estimates the number of U. S. households, in millions, expected to install devices that receive and manage broadband TV and Internet content to the home, where x is the number of years after 2005. For what years will there be at least 40 million homes with these devices? Write your answer as an inequality involving x.

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  1. 10 March, 08:40
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    X ≥9 years after 2009.

    Step-by-step explanation:

    Y=4x+4

    Y-4=4x

    X = (Y-4) / 4

    Y=number of U. S. households, in millions.

    Y≥40

    Y-4≥36

    (Y-4) / 4≥9

    So, X≥9.
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