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 Word Problems! Jan 15 realy hard shit idk

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cruise

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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Jan 17, 2012 12:14 am


goodbye canada
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Frevett



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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Jan 17, 2012 11:38 pm

1)
V(x)=x(10-2x)(8-2x)=80x-36x^2+4x^3
D

2)
(3-2i)-(x+yi)=(3-x)-(y+2)i=2-3i.
x=1,y=1. D

3)
(1+2i)/(2-3i) = (1+2i)(2+3i)/(2-3i)(2+3i) = (-4+7i)/13
B

4) ---

5)
fg(x)=f(g(x))=f(x-1)=(x-1)^2 -(x-1)=x^2-3x+2
C

6) ---

7)
Volume=x(11-2x)(8.5-2x). Plug in the options. 2.66 and 0.71 give volumes ~48. 0.71 is the smallest,
C
Never done maths in imperial before

8 )
Solve P(x)=0
-750x^2+15000x=0
-x^2+20x=0
Negative quadratic so P>0 for 0<x<20, so x outside that range gives the company a loss. x<0 is nonsensical in context, so x>20.
D

9) ---

10)
Factorise the quadratic. 4x^2-21x-18=(4x+3)(x-6)
B

11)
Root at x=-1, repeated root at x=2. f(x)=(x+1)(x-2)(x-2)
C

12)
Negative quadratic so C/D. Leading co-efficient negative, other two positive implies roots of opposite signs.
D

13)
Plunger: 144ft. Solve h(t)=0
-16t^2+144=0. t=3
time for the skydiver 4.5
Solve -16(4.5^2)+h0=0. h0=324.
C

14)
Quadratics are symmetric. Roots are equidistant from the y-axis so the vertex is at x=0
D

15)
Coefficients are real means that the other root is the conjugate: 3-2i. Linear coefficient of a monic quadratic is negative the sum of the roots. Sum of the roots is 6, so the coefficient is -6
B


Last edited by Frevett on Wed Jan 18, 2012 2:15 am; edited 1 time in total (Reason for editing : Accuracy)
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Wed Jan 18, 2012 1:38 am

now you got your free online math big brother
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Wed Jan 18, 2012 2:28 am

frevett ._.
i turned this in today

but thanks so much
i'll try to see if i got my answers right
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Thu Jan 19, 2012 2:13 am

did you get them right?
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Mon Jan 30, 2012 2:07 am

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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 07, 2012 4:09 am

I got an 86% on the word problems, but I redid them and hopefully i get some extra credit.








Why does Frevett not have his own smile yet?
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 07, 2012 4:39 am

i think his should be:
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 07, 2012 5:04 am

LOL, Von. xD

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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 07, 2012 4:23 pm

lol!

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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Mon Feb 20, 2012 11:44 pm

poo wrote:
Why does Frevett not have his own smile yet?

How do I get one?
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 21, 2012 12:04 am

You have to generously spit on the palm of your hands and rub both hands together for 8 seconds. Then gently massage your eyes with your palms, being careful to keep your eyes closed. Concentrate on the squishy sounds you hear and you should be able to visualize your emote. Once you are done, you send a message to mizuhonova stating which emote appeared during your eye massage
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 21, 2012 12:35 am

V☺n wrote:
You have to generously spit on the palm of your hands and rub both hands together for 8 seconds. Then gently massage your eyes with your palms, being careful to keep your eyes closed. Concentrate on the squishy sounds you hear and you should be able to visualize your emote. Once you are done, you send a message to mizuhonova stating which emote appeared during your eye massage

wrong it has to be 10 seconds
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 21, 2012 12:46 am

V☺n wrote:
You have to generously spit on the palm of your hands and rub both hands together for 8 seconds. Then gently massage your eyes with your palms, being careful to keep your eyes closed. Concentrate on the squishy sounds you hear and you should be able to visualize your emote. Once you are done, you send a message to mizuhonova stating which emote appeared during your eye massage

We would be happy to give you an emote. But you should post more.

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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 21, 2012 12:54 am

Taxmaster wrote:
wrong it has to be 10 seconds
Listen to the Taxmaster - 10 seconds
we all went through this
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Tue Feb 21, 2012 2:43 am

N☺va wrote:
V☺n wrote:
You have to generously spit on the palm of your hands and rub both hands together for 8 seconds. Then gently massage your eyes with your palms, being careful to keep your eyes closed. Concentrate on the squishy sounds you hear and you should be able to visualize your emote. Once you are done, you send a message to mizuhonova stating which emote appeared during your eye massage

We would be happy to give you an emote. But you should post more.
do you not see the post he made?
he helped someone you would not even talk to
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PostSubject: Re: Word Problems! Jan 15 realy hard shit idk   Wed Feb 22, 2012 12:59 am


have you been doing your hw lately cruz
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