Page 1 of 3 123 LastLast
Results 1 to 10 of 21

Thread: On holiday... free to do homework for you. Math, English, Chinese, Biology and Chemistry.

  1. #1
    watersniper's Avatar
    Join Date
    Dec 2012
    Gender
    Posts
    113
    Thanks
    20
    Thanked 13 Times in 12 Posts


    Downloads
    16
    Uploads
    1
    Mentioned
    8 Post(s)
    Time Online
    1 d 23 h 14 m
    Avg. Time Online
    1 m
    Rep Power
    5

    On holiday... free to do homework for you. Math, English, Chinese, Biology and Chemistry.

    I'm really bored, on holiday right now. Throw me your high school or uni first year problems! Heck, even if you have questions tougher than those, let me try them out too.

    I can do up to single variable calculus with confidence... A little shaky on linear algebra, multivar calculus and its theorems but I can try too.
    Took AP Biology, AP Chem, AP Physics, AP Stats and AP Calc last year (I'm not from the US so I don't have to take everything).
    Generally I can do physics too but am not as good at it as at the other subjects.

  2. The Following User Says Thank You to watersniper For This Useful Post:

    Mint (01-13-2013)

  3. #2
    Joelalala's Avatar
    Join Date
    Dec 2011
    Gender
    Location
    Uptown Vampire ♥
    Posts
    806
    Thanks
    350
    Thanked 181 Times in 105 Posts


    Downloads
    51
    Uploads
    0
    Mentioned
    84 Post(s)
    Time Online
    12 d 18 h 8 m
    Avg. Time Online
    9 m
    Rep Power
    6

    On holiday... free to do homework for you. Math, English, Chinese, Biology and Chemistry.

    I don't understand anything you said. D:

  4. #3

    Mod's Avatar
    Join Date
    Nov 2012
    Gender
    Location
    Canada
    Posts
    2,821
    Thanks
    1,563
    Thanked 4,711 Times in 2,504 Posts


    Downloads
    0
    Uploads
    0
    Mentioned
    1365 Post(s)
    Time Online
    131 d 12 h 4 m
    Avg. Time Online
    1 h 42 m
    Rep Power
    11
    You're on holiday now? You lucky ass. Mine ended yesterday.

    (btw, your English is excellent for I assume, Chinese?)

    @Joelalala , if you don't understand it, you don't need to...yet,

    But for the rec, single var is just solving/involving 1 variable, eg. 'x'.

    Multi var is 2 or more, like 'x', 'y', 'z'.

    Lin alg usually involves graphs on a Cartesian Plane, and most of the time, can be done by calculator.

    Calculus is done by hand (early stages at least), and involves derivation of functions to different orders.

  5. #4
    watersniper's Avatar
    Join Date
    Dec 2012
    Gender
    Posts
    113
    Thanks
    20
    Thanked 13 Times in 12 Posts


    Downloads
    16
    Uploads
    1
    Mentioned
    8 Post(s)
    Time Online
    1 d 23 h 14 m
    Avg. Time Online
    1 m
    Rep Power
    5
    Mine's ending in a couple of weeks. Haha.
    Going to have to start studying for the next semester, sucks, but I'm taking a programming module so maybe I can finally do something for clraik

  6. #5

    Join Date
    Dec 2012
    Gender
    Posts
    66
    Thanks
    3
    Thanked 6 Times in 5 Posts


    Downloads
    14
    Uploads
    0
    Mentioned
    4 Post(s)
    Time Online
    2 d 1 h 42 m
    Avg. Time Online
    1 m
    Rep Power
    5
    Hey do partial derivatives and optimization in multivar for me

  7. #6
    watersniper's Avatar
    Join Date
    Dec 2012
    Gender
    Posts
    113
    Thanks
    20
    Thanked 13 Times in 12 Posts


    Downloads
    16
    Uploads
    1
    Mentioned
    8 Post(s)
    Time Online
    1 d 23 h 14 m
    Avg. Time Online
    1 m
    Rep Power
    5
    pm me the questions lol i'll like to try them out for fun.
    but mind you i suck at multivar in the later stages.

  8. #7


    Mint's Avatar
    Join Date
    Dec 2012
    Gender
    Location
    [23/07/2014 10:57:41 AM] Ryan: i just want drake to get married
    Posts
    2,651
    Thanks
    4,135
    Thanked 2,484 Times in 1,235 Posts


    Downloads
    30
    Uploads
    0
    Mentioned
    1134 Post(s)
    Time Online
    194 d 21 h 53 m
    Avg. Time Online
    2 h 35 m
    Rep Power
    10
    Gamer IDs

    PSN ID: Z-E-P-H-Y-R-__
    2x(3x-2)+x^2+0.2(x^2+3)
    expand + simplify
    please explain the steps...i keep getting 2x+1.2x^2+0.6, and that's wrong according to the back of my textbook

  9. #8

    Mod's Avatar
    Join Date
    Nov 2012
    Gender
    Location
    Canada
    Posts
    2,821
    Thanks
    1,563
    Thanked 4,711 Times in 2,504 Posts


    Downloads
    0
    Uploads
    0
    Mentioned
    1365 Post(s)
    Time Online
    131 d 12 h 4 m
    Avg. Time Online
    1 h 42 m
    Rep Power
    11
    Quote Originally Posted by Mint View Post
    2x(3x-2)+x^2+0.2(x^2+3)
    expand + simplify
    please explain the steps...i keep getting 2x+1.2x^2+0.6, and that's wrong according to the back of my textbook
    Maybe I can help, though I haven't touched algebra in years (and hated it when I did). It might be wrong, but until watersniper comes on to do it himself, this is what I got:

    Firstly when you typed "(x^2+3)", I assume you meant "[(x^2)+3]", not "x^5", right?

    If so, I got 7.2x^2-4x+0.6, or in fraction form, (36/5)x^2-4x+(3/5)

    If I'm right, I can explain. If I'm wrong, you probably wouldn't want me to explain,

  10. #9


    Mint's Avatar
    Join Date
    Dec 2012
    Gender
    Location
    [23/07/2014 10:57:41 AM] Ryan: i just want drake to get married
    Posts
    2,651
    Thanks
    4,135
    Thanked 2,484 Times in 1,235 Posts


    Downloads
    30
    Uploads
    0
    Mentioned
    1134 Post(s)
    Time Online
    194 d 21 h 53 m
    Avg. Time Online
    2 h 35 m
    Rep Power
    10
    Gamer IDs

    PSN ID: Z-E-P-H-Y-R-__
    @Mod Yes, that's correct. xD

    Please explain the steps, and what I'm doing wrong, line by line!

    You'll be repped handsomely ~

  11. #10

    Mod's Avatar
    Join Date
    Nov 2012
    Gender
    Location
    Canada
    Posts
    2,821
    Thanks
    1,563
    Thanked 4,711 Times in 2,504 Posts


    Downloads
    0
    Uploads
    0
    Mentioned
    1365 Post(s)
    Time Online
    131 d 12 h 4 m
    Avg. Time Online
    1 h 42 m
    Rep Power
    11
    First, I'll give you what I got when I expanded it, before I explain:

    (6x^2)-(4x)+(x^2)+(0.2x^2)+(0.6) , when simplified, is the answer I gave you above. The brackets here are just there to make it easier to see.
    ****************************
    1A. Basic expansion:

    -You multiply every term inside the brackets (eg. 3x and -2, that's 2 terms), by every term outside of the bracket (eg. 2x)
    -So "2x" * "3x" = "6x^2"
    -Remember when you're multiplying here, that you have to do both the number (eg. 2 * 3 = 6), AND the variable (x * x = x^2), hence "6x^2"

    -So of the original "2x(3x-2)", we've done the first term. The second term (-2) is a cinch:
    -"2x" * "-2" = "-4x"
    ****************************
    1B. Basic expansion (continued):

    -And repeat that for the second part of the function "0.2(x^2+3)"

    -"0.2" * "x^2" = "0.2x^2"
    -"0.2" * "3" = "0.6"

    The term in the middle of the expanded form I wrote at the beginning, "x^2" is irrelevant, because it's just there [eg. 2x(3x-2)+x^2+0.2(x^2+3)]. You don't have to do anything to it.
    ****************************
    2. Simplify:

    -So you've got the expanded form now, all you do is add/subtract the "like terms". A like term is anything with the same variable type (or just numbers) and power
    -(eg. you can do "x^2 + 2x^2 = 3x^2", but cannot do "x + 2x^2", because one is ^2)

    -"(6x^2) + (x^2) + (0.2x^2) = 7.2x^2" [or (36/5)x^2, same thing]
    -"-4x = -4x" (it's the only term of the same power)
    -"0.6 = 0.6" (it's the only term of the same power); 0.6 in fraction is "3/5"

    And that leads to 7.2x^2-4x+0.6, or in fraction form, (36/5)x^2-4x+(3/5)
    ****************************
    3. Side-note:

    -When writing out simplified answers, always arrange the terms from highest power to lowest
    -eg. x^2+x+1, not something whacky like 1+x^2+x

  12. The Following User Says Thank You to Mod For This Useful Post:

    Mint (01-13-2013)

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •