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Math

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Serena paid $20.20 for 36 rulers and folders. She bought 16 more folders than rulers. If each folder cost $0.50 more than each ruler, how much did each folder cost?

  • Math -

    rulers --- x
    folders --- x+16

    x + x+16 = 36
    2x = 20
    x = 10 , then y = 26

    so she bought 10 rulers and 16 folders

    now to the cost:
    cost of ruler --- y
    cost of folder --- y + .5

    10y + 16(y+ .5) = 20,2
    10y + 16y + 8 = 20.2
    26y = 12.2
    y = .4692

    A ruler costs $0.47 and a folder costs $ 0.97

    check:
    10(.47) + 16(.97) = 20.22

  • Math -

    I don't know i came here for the answers!!

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