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teller

  • one year ago

A Web music store offers two versions of a popular song. The size of the standard version is 2.7 megabytes (MB). The size of the high-quality version is 4.6 MB. Yesterday, the high-quality version was downloaded twice as often as the standard version. The total size downloaded for the two versions was 2499 MB. How many downloads of the standard version were there? @Vocaloid

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  1. Vocaloid
    • one year ago
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    well, this is a very similar problem to the other one, so let's start off the same way. H = number of high-quality downloads S = number of standard-quality downloads H = 2*S 2.7*S + 4.6*H = 2499 do you think you can finish from here? if you get stuck, remember the other problem that we just did

  2. teller
    • one year ago
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    I don't have the other problem since it got rid of it so do I take 2.7(3-S)+4.6=2499?

  3. Vocaloid
    • one year ago
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    I'm not sure where you're getting 3 from

  4. teller
    • one year ago
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    i mean 2 sorry

  5. Vocaloid
    • one year ago
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    remember, H = 2*S means that you can replace "H" with "2S" whenever you see it

  6. Vocaloid
    • one year ago
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    take another look if you are still confused http://openstudy.com/study#/updates/55d52a97e4b0554d6272fa4c

  7. teller
    • one year ago
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    so2.7s+4.6(2-s)=2499?

  8. Vocaloid
    • one year ago
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    almost, there shouldn't be a minus sign... 2.7S + 4.6(2*S) = 2499, agreed?

  9. teller
    • one year ago
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    alright so if im correct i'd take 4.6 and times it by 2?

  10. Vocaloid
    • one year ago
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    right, and that gives us...?

  11. teller
    • one year ago
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    9.2?

  12. Vocaloid
    • one year ago
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    don't forget the S 4.2(2*S) = 9.2S

  13. Vocaloid
    • one year ago
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    so that leaves us with 2.7*S + 9.2*S = 2499 can you try solving for S now?

  14. teller
    • one year ago
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    would it be 210?

  15. Vocaloid
    • one year ago
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    yup, so that's our answer

  16. teller
    • one year ago
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    thank you

  17. Vocaloid
    • one year ago
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    S = number of standard downloads = 210

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