MATH PROBLEM HELP!! EXTRA POINTS!!!?

gigigigi
in Science & Mathematics

A stamp collection consists of $0.06 stamps and $0.15 stamps. The number of $0.06 stamps is a quarter of the number of $0.15 stamps. The total face value of the stamps is $165.00. How many $0.06 stamps are there?

Thanks so much!

Comments

  • polyhymniopolyhymnio

    Let s = number of 6-cent stamps and f = number of 15-cent stamps

    f = 4s

    0.06s + 0.15f = 0.06s + 0.15(4s) = 0.66s = 165

    s = 165/0.66 = 250 6-cent stamps

    f = 4s = 1000 15-cent stamps

    Check: 1000*$0.15 + 250*$0.06 = $165

  • ethan-phillips_60afba69bb4beethan-phillips_60afba69bb4be

    Let the number of $0.06 stamps be x

    Since it is a quarter of the number of $0.15 stamps,there are 4x of $0.15 stamps.

    Total value is $165 =0.15*4x +0.06x =0.66x

    x =165/0.66 = 250

  • anonymousanonymous

    Let The number of $0.06 stamps be X and let The number of $0.15 stamps be Y.

    X=1/4Y

    4X=Y

    0.06X+0.15Y=165.00

    0.06X+0.60X=165.00

    0.66X=165.00

    66X=16500

    X=250

    Therefore,there are 250 $0.06 stamps.

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