can someone figure this out for me

Discussion in 'Random Thoughts' started by alex714, Jan 8, 2005.

  1. alex714

    alex714 To the Left

    k, i need to find out my exam mark
    i know that my final mark is an 80%
    my exam is 40% of that
    while the other 60% were my two test, averaged at a 84.5%
    so, what was my exam mark???
     
  2. hiro

    hiro pursue it

    Uh sorry Alex I have no clue.
     
  3. alex714

    alex714 To the Left

    thats alright em,

    im so math challenged. i cant deal with numbers and percentages....so confusing

    some help! please please
     
  4. Juggalo4ever

    Juggalo4ever KingoftheChubbyGirls

    Steve says 'I think it's around 75.4, but I'm probably wrong."





    [​IMG]
     
  5. alex714

    alex714 To the Left

    how wrong???

    i hope thats not right, i studied my ass off, 75 isnt good enough
     
  6. hiro

    hiro pursue it

    What class was this for?
     
  7. alex714

    alex714 To the Left

    ancient greek civ, em


    come on, are there no math nerds on here!!
     
  8. hiro

    hiro pursue it

    If you had points I could do it.
     
  9. Bellfire01

    Bellfire01 I'll say anything

    I'd say 82.
     
  10. alex714

    alex714 To the Left

    really! now that would be great.
    how accurate do you think you are??
     
  11. luvndrumn

    luvndrumn Hip Forums Supporter HipForums Supporter

    final mark = .40(exam mark) + .60(two tests)
    80 = .40x + .60(84.5)
    80 = .40x + 50.7
    now, subtract 50.7 from both sides so that .40x is the only thing on one side...
    this gives you:
    80 - 50.7 = .40x
    29.3 = .40x
    now this tells you that 40% of x is equal to 29.3
    since .40 (40%) can also be stated as 4/10 (four over ten), you can write .40x as 4x/10 (4x over ten)
    29.3 = 4x/10
    you can now divide both side by ten. why? you want to get the equation down to 4x = some number which will allow you to divide some number by four.
    so now you have
    29.3 * 10/1 = 4x/10 * 10/1
    on the side of the equation to the right of the "=" sign, the two tens cancel each other out, leaving 4x * 1. on the right side of the equation, multiply 29.3 times 10, giving you 293,
    which leaves you with
    293 = 4x
    now divide both sides by 4
    293 / 4 = 4x / 4
    just like the tens, the two fours on the right side cancel each other out, leaving you with
    293/4 = x
    73.25 = x
    now go plug 73.25 back into the original formula, do the match, and see if your final grade isn't 80
    80 = .40(73.25) + .60(84.5)
    80 = 29.3 + 50.7
     
  12. hiro

    hiro pursue it

    So her grade is... 73.25? Al when do you get your report card?
     
  13. Bellfire01

    Bellfire01 I'll say anything

    I don't know. I only have your 2 test to go on and I thought of the 80% and did the math. 84 + 80= 164\2 =82 Lets hope that it's pretty good anyway. ;)
     
  14. luvndrumn

    luvndrumn Hip Forums Supporter HipForums Supporter

    No, her final mark is 80% (unless I misread), her exam grade is 73.25%.
     
  15. alex714

    alex714 To the Left

    :eek:

    holy shit

    wow....thats a lot...thank you though!
    just crazy....
    so...just to sum that all up....my exam marks is 73.25?? (i feel really stupid right now.)
     
  16. hiro

    hiro pursue it

    I am confused now. I thought she wanted the final grade.... gah nevermind *walks to corner*
     
  17. alex714

    alex714 To the Left

    em, i didnt get a report card. my marks are posted online, just a final and you have to figure your exam mark out on your own if you want to know.

    luvndrumn, thanks so much for writing that all out! i still dont understand how you got too it, but thanks.
     
  18. hiro

    hiro pursue it

    Ohhh well then lets be happy that the final grade was a 80%. What were you other grades? Oh btw I never care about the final grade as long as the end result is what I want.
     
  19. alex714

    alex714 To the Left

    wow, luvndrumn is a genious...really.....look at all that!

    i dont know yet, i just got that one mark back. im waiting on geology...i had a nervous breakdown before writing that exam so i probably did horrible.
     
  20. luvndrumn

    luvndrumn Hip Forums Supporter HipForums Supporter

    If you said that your final mark is 80, that your exam score is 40% of your final mark, that your two other tests are 60% of your final mark, and that your average of the two test is 84.5, then yes, you scored 73.25 on your final.

    But you got an 80 for your class and that puts you at passing, right?;)

    The ONLY reason you should ever feel bad about a score is if you didn't do the best you could at that moment in time.
     

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