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Math Help - Algebra questions part 2

  1. #1
    SMl
    SMl is offline
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    Algebra questions part 2

    Need Help! Would like To know How to solve these..... Would like to know step by step(formula)

    Numerical Skills/Prealgebra




    6. Four students about to purchase concert tickets for $18.50 for each ticket discover that they may purchase a block of 5 tickets for $80.00. How much would each of the 4 save if they can get a fifth person to join them and the 5 people equally divide the price of the 5-ticket block?
    A. $ 1.50
    B. $ 2.50
    C. $ 3.13
    D. $10.00
    E. $12.50


    8. Saying that 4 < x < 9 is equivalent to saying what about x ?

    A. 0 < x < 5
    B. 0 < x < 65
    C. 2 < x < 3
    D. 4 < x < 9
    E. 16 < x < 81



    9. What value of x solves the following proportion?

    9/6= 8/x

    A. 5 1/3
    B. 6 3/4
    C. 10 1/2
    D. 11
    E. 12
    Last edited by mr fantastic; April 29th 2009 at 05:27 PM. Reason: Moved from original thread
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  2. #2
    Senior Member chella182's Avatar
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    For question 6, begin by doing 18.50 \times 5 = 92.50 (that's how much it would cost for 5 gig tickets separately). Since the batch of 5 costs $80.00, they will save 92.50-80.00=12.50.

    I'd go for option D for question 8...

    Question 9... So the problem here is \frac{9}{6}=\frac{8}{x} (it's easier to see it in tiered fractions. First, I'd multiply up by the 6 to acquire...
    9=\frac{8\times 6}{x}=\frac{48}{x}
    ...and then multiply up by the x to get...
    9x=48
    Then finally dividing through by 9 gives x=\frac{48}{9}=5\frac{1}{3}.
    Last edited by mr fantastic; April 29th 2009 at 05:27 PM. Reason: Moved from original thread
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