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29 November, 15:29

The equation y=-5.131x^2 31.821x-3.333 approximates the number of people standing in line to catch commuter train x hours after 5am what is the best estimate for the number of people in line at 9am

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  1. 29 November, 17:05
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    9am is 4 hours after 5am, so x=4

    Substitute x=4 into the equation

    y=-5.131 (4) ^2 31.821 (4) - 3.333=ans

    the sign before 31.821x is missing
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