A college student earns $21 per day delivering advertising brochures door-to-door, plus 50 cents for

Discussion in 'Calculator Requests' started by math_celebrity, Aug 22, 2020.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    A college student earns $21 per day delivering advertising brochures door-to-door, plus 50 cents for each person he interviews. How many people did he interview on a day when he earned $61.50

    Let each person interviewed be p. We have an earnings equation E(p):
    E(p) = 0.5p + 21

    The problems asks for p when E(p) = 61.50
    0.5p + 21 = 61.50

    To solve for p, we type this equation in our search engine and we get:
    p = 81
     

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