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March 30, 2017

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Melons cost QR1.5 each and apples cost QR3.75 per kilogram. A man buys apples and melons at the supermarket. Write a formula to describe the total cost of his purchase.
Investigate how many melons and how many kilograms of apples he could buy for QR30.

**QR is a currency :)

  • math - ,

    First you must define your variables.
    In full sentence form define
    apples ---> a
    melons ---> m

    then Cost = 3.75a + 1.5m



    second equation:
    3.75a + 1.5m ≤ 30
    multiply this equation by 4

    15a + 6m ≤ 120 , dividing by 3
    5a + 2m ≤ 40

    2m ≤ 40 - 5a

    For m to be a whole number, the right side of the above statement has to be even, so a must be an even number
    0 ≤ a ≤ 8

    so give a values of 0, 2, 4, 6, and 8

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