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9 May, 06:01

Bradley is returning home from a place that is 2 kilometers away. The function y = 2,000 - 90x represents Bradley's distance from home in meters, y, in relation to the number of minutes he walks, x. Which statements about this function are true?

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  1. 9 May, 06:27
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    In an algebraic equation, you should have at least 2 variables: the independent and the dependent. The independent variable in this case, is the parameter that cannot be controlled - time. This is expressed in minutes using the variable x. The dependent variable is the parameter you want to measure - the distance expressed using the variable y. Since the problem states a parameter of distance in terms of 2 kilometers, y=2. Therefore, I think the choices would be about the amount of minutes it would take for Bradley to cover this distance. Assuming this is the case, then the answer would be:

    2 = 2000 - 90x

    90x = 2000-2

    90x = 1998

    x = 1998/90

    x = 22.3 minutes

    It would take 22.3 minutes for Bradley to cover the 2 kilometers so that he could get home.
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