goodbye canada

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

frevett ._.
i turned this in today

but thanks so much
i'll try to see if i got my answers right

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?

LOL, Von. xD

poo wrote:

Why does Frevett not have his own smile yet?

How do I get one?

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

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.

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