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Math Help - Need some help year 10

  1. #1
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    New Lynn
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    Need some help year 10

    Hi i'm really stuck on this question. I tried to look up on youtube etc, but could'nt find anything.
    Heres the question:

    If 30 or more people are going on a train trip, the cost for "n" people is "$d"

    d calculated using the formula "d= 60(n/4-5)

    How much will the train trip cost for 48 people?

    Please note I don't need the answer for this even a link to video, on how to do this would be fine. BUT I wouldn't mind a answer as well.
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  2. #2
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    Re: Need some help year 10

    if d = 60((n/4)-5) then you get the cost, d, for n people by inserting n=48 into  d=60((48/4)-5) so you should be able to get d from here
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  3. #3
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    Re: Need some help year 10

    N = number of people so D = 60 ((48/4) - 5) Solve parts in the inner brackets first, 48/4 then minus the 5, multiply that answer by 60.
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