Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 decade ago

Brain teaser/ logic homework?

I don't understand these problems hopefully you the answerer can guide me through the explanation and answers:

1. I subsribe to the comic-of-the-month club. Each month I can buy any number of the 48 titles offered by the club. The first month I bought five comics for $3.07. The second month I bought two comics for $1.72. The next month I bought six of the club offerings for $3.52. In May I bought three more for a charge of $2.17. The club charges a handling fee and then a fee for each comic. How much would it have cost to buy all 48 titles at the same time?

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  • 1 decade ago
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    The question doesn't say whether all comics cost the same. Assuming they do, let the cost of a comic = c and the handling fee = h.

    Then we can find h and c by solving simultaneously the equations for any 2 transactions. I'll use the first two:

    h + 5c = $3.07

    h + 2c = $1.72

    Subtracting the second equation from the first, we get

    3c = $1.35

    c = 45 cents

    and h = $1.72 - 2c = $1.72 - 90 cents = 82 cents.

    (I note that

    h + 6c = 82 cents + (6 x 45) cents = $3.52 and

    h + 3c = 82 cents + (3 x 45) cents = $2.17,

    so evidently the comics are indeed all the same price.)

    The cost of buying 48 titles at once =

    82 cents + (48 x 45) cents

    = 82 cents + $21.60

    = $22.42

  • 6 years ago

    confusing step. look on to search engines like google. that will will help!

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