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    dsmith76544's Avatar
    dsmith76544 Posts: 4, Reputation: 1
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    #1

    May 15, 2008, 06:08 AM
    How to put this in a formula
    This is what I have so far: 0.2*W + 0.6*J = 0.44*x

    Wilson High School has 400 students, of whom 20% are African American. The school board plans to merge Wilson High with Jefferson High. This one school will then have a student population that is 44% African American. If Jefferson currently has a student population that is 60% African American, then how many students are at Jefferson?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    May 15, 2008, 06:52 AM
    It would be handy to construct a graph.

    Let x represent the number of students altogether at Jefferson. Then .60x are black and .40x are not black.

    That means 80+.60x = the number of black students at the new school

    .40x+320 = the number of students who are not black.

    400+x are the total number at the new school.

    Therefore, we have the equation:

    .44(400+x)=80+.60x

    Solve for x. That is the total number of students at the new school.

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