Question

Help with math

Answer 1

yes?

Answer 2

What do ya need? :3

Answer 3

here it is

Answer 4

As one of the new roller coaster engineers, you have been tasked with developing a roller coaster that will intertwine with existing Oakville Lake Amusement Park structures. For one of the more thrilling sections, the roller coaster will dive down in-between buildings, plummet underground, pop back up, and coast over a hill before shooting back underground. There must be three distinct points where the roller coaster crosses the x–axis. Precise measurements and attention to detail are very important.
coordinate plane with buildings blocking off x–intercepts of negative 11, negative 10, 0, 1, 2, 3, 9, and 10

First, here is the existing map of current structures. It is important that the roller coaster does not go through the foundation of any of these structures.

1st point: ___6___
2nd point:___-2___
3rd point: ___-7___

Using the points above as zeros, construct the polynomial function, f(x), that will be the path of your roller coaster. Show all of your work.

Root 6 has a factor of (x-6), root -2 has a factor of (x-(-2)), and root -7 has a factor of (x-(-7)). Multiplying (x-6) and (x+2), I get x^2-4x-12. Then I multiply by (x+7), so (x^2-4x-12)(x+7). Then I get the function of f(x)=x^3 + x^2-28x-12x-84

Using both fundamental Theorem and Descartes` rule of signs, prove to the construction foreman that your function matches your graph. Use complete sentences.



Solve for the y–intercept for your function, f(x), and then construct a rough graph of your roller coaster. If your y–intercept is off the graph, give the coordinates of the y–intercept.

Answer 5

hold on while i get the pic, 1 sec

Answer 6

http://assets.openstudy.com/updates/attachments/53952d83e4b03871bbf0015f-thejp-1402285591213-04_05_assessment.jpg

Answer 7

@arabpride can you help?

Answer 8

@Nishant_Garg I just need help with the last two

Answer 9

The function you got by multiplying the 3 factors, didn't it work?

Answer 10

Not sure, I got this far from another person and they just left after the 1st question

Answer 11

It did work but I have to prove it A.K.A have my math teacher put another pointless hurdle

Answer 12

check out this link
http://www.wolframalpha.com/input/?i=x%5E3%2Bx%5E2-28x-12x-84

Answer 13

look at the graph

Answer 14

what am i lookin for?

Answer 15

I still don't understand...

Answer 16

actually it should be
\[x^3+3x^2-40x-84\]
instead of
\[x^3+x^2-40x-84\]

Answer 17

see if the graph from wolfram fits your graph, (it should not cross any building)

Answer 18

they both work

Answer 19

so what does this give me, sorry for being clueless but this is like trying to smell a sound to me

Answer 20

I'm not sure but I guess you've got your function from multiplying the 3 factors
\[f(x)=x^3+3x^2-40x-84\]
It is intersecting at (6,0),(-2,0),(-7 ,0)as required and you've got your rough graph.

Answer 21

graph from wolfram

Answer 22

so whats the answer?

Answer 23

I don't think its crossing any building aswell

Answer 24

is it the expression next to the graphs on the website?

Answer 25

your answer would be
\[f(x)=x^3+3x^2-40x-84\]
and that graph from wolfram
I'm not sure though, is there anything else that's required

Answer 26

ok so the f(x) equation for the 2nd to last question and the graph for last?

Answer 27

yeah I guess

Answer 28

THANK YOU SO MUCH MAN, IVE BEEN TRYING TO SOLVE THIS FOR A MONTH AND NO ONE WOULD HELP!!!

Answer 29

oh my god, one month???

Answer 30

and two others. every one just gives up and leaves

Answer 31

no need to worry now, you can always find help over here at this website

Answer 32

k can you help me with the other two later

Answer 33

or now?

Answer 34

Not right now, I'm studying but you can always ask your question here just close this one and post a new one if you need more help

Answer 35

okay, good luck man

Answer 36

Also don't ask for answers here, we prefer it here to guide people to the answers

Answer 37

I know just my teacher was starting to get mad and I needed it quick

Answer 38

don't worry about it too much, nobody is going to ask for your homework after school

Answer 39

I do online schooling so my teacher just threatens to drop me from the class

Answer 40

oh..

Answer 41

Ive heard about home schooling, but online schooling, that's hardcore man

Answer 42

You should check out Khan Academy if you study online

Answer 43

yea. im not really a fan of her, a week without turning in assignments is pretty much termination

Answer 44

@gnrfan have you tried Khan Academy before?

Answer 45

ive been on that before, its ok