Margaret earns 15 an hour at her job. Each week she earns at least 450 and no more than 600. How man

Discussion in 'Calculator Requests' started by math_celebrity, Feb 28, 2022.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    Margaret earns 15 an hour at her job. Each week she earns at least 450 and no more than 600. How many hours does Margaret work each week?

    Let h be the hours worked
    We know that hourly rate * h equals total earnings.
    The phrases at least and no more than signify inequalities, so we have:
    450 <= 15h <= 600

    Divide each entry by 15:
    30 <= h <= 40

    This means Margaret works at least 30 hours a week and no more than 40
     

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