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Math Help - pre-algebra

  1. #1
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    pre-algebra

    You would like to purchase a monthly package from and Internet Provider.
    States online charges $2.95 monthly and then 30 cents every hour you use the service.
    Big Neat Online charge $4.95 monthly plus 10 cents every hour you use the service.
    Which service would be the cheapest,if you average 51 hours a month online?
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  2. #2
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    Quote Originally Posted by dianna View Post
    You would like to purchase a monthly package from and Internet Provider.
    States online charges $2.95 monthly and then 30 cents every hour you use the service.
    Big Neat Online charge $4.95 monthly plus 10 cents every hour you use the service.
    Which service would be the cheapest,if you average 51 hours a month online?

    Hello, dianna,

    let C be the costs for/of the service
    let t be the hours you are online

    Then the costs can be calculated by:

    States online: C = 2.95 + 0.3*t
    Big Neat online: C = 4.95 + 0.1*t

    Now plug in t = 51 and you'll get:

    SO: C(51) = $18.25
    BN: C(51) = $10.05

    By the way: At t = 10 h both providers want $5.95

    EB
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