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Math Help - Algebra questions part 1

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

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

    Numerical Skills/Prealgebra



    2. The lowest temperature on a winter morning was –8F. Later that same day the temperature reached a high of 24F. By how many degrees Fahrenheit did the temperature increase?
    A. 3
    B. 8
    C. 16
    D. 24
    E. 32


    3. If (3/4 -2/4) + (1/2 + 1/3)
    2+3 is calculated and the answer reduced to simplest terms, what is the
    denominator of the resulting fraction?
    A. 24
    B. 12
    C. 6
    D. 4
    E. 3




    5. Mr. Brown went grocery shopping to buy meat for his annual office picnic. He bought 7 3/4 pounds of hamburger, 17.85 pounds of chicken, and 6 1/2 pounds of steak. How many pounds of meat did Mr. Brown buy?
    A. 32.10
    B. 31.31
    C. 26.25
    D. 22.10
    E. 21.10
    Last edited by mr fantastic; April 29th 2009 at 04:25 PM. Reason: Moved from original thread
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  2. #2
    Senior Member chella182's Avatar
    Joined
    Jan 2008
    Posts
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    For question 2, you take the smaller number, -8 from the biggest number 24, remembering when you take off a negative number you end up adding, i.e.

    24-(-8)=24+8=32

    I'm not sure I understand how you've written question 3... did you mean \frac{3}{4}-\frac{2}{4}+\frac{1}{2}+\frac{1}{3}+2+3?

    For question 5, you should write 7\frac{3}{4} pounds as 7.25 (since \frac{3}{4}=0.75) and 6\frac{1}{2} as 6.5 (since \frac{1}{2}=0.5). Then...

    7.75+17.85+6.5=32.1

    Hope this helps
    Last edited by mr fantastic; April 29th 2009 at 04:26 PM. Reason: Moved from original thread
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