The homework help thread...(SERIOUS)

[denbrkln]

can anyone simplify the meaning of this sentence?
"He started from the assumption that hierarchy is innate in the order of the universe..."

there is always someone on top, someone on the bottom naturally.

Hierarchy is a word for a ranking of things or people, like a food chain per se.

Innate means natural.

[ARTAthletix]

y would i go 2 da bb.com tee,n misc 2 get hw help wen i haz da holy google serch buton at da tawp Lern how, 2 use da interwebz ppl's. U ppl need 2 get lerned at skool


Edit: Just Kidding mmkay so dont neg rape me

[kopimi]

y would i go 2 da bb.com tee,n misc 2 get hw help wen i haz da holy google serch buton at da tawp Lern how, 2 use da interwebz ppl's. U ppl need 2 get lerned at skool


Edit: Just Kidding mmkay so dont neg rape me

...was that supposed to be funny?

you're 14 you can always google your basic geometry but most of the more advanced stuff doesn't have a dedicated answer to find.

[ARTAthletix]

...was that supposed to be funny?

you're 14 you can always google your basic geometry but most of the more advanced stuff doesn't have a dedicated answer to find.

try theoretical geometry 2

[scantraxx]

I'm not at school anymore but grabbed an old school book and started doing a bit of math so I can brush up on it a bit and having a bit of trouble now and again so I might be posting here a bit haha.

Anyway, I need to know how to work this out, I have worked all the other ones out, just not the ones I circled in red.



The answers to these are:

J = 0.1 and 0.0801

K = 50 and 57.7632

L = 8 and 7.5724

Help would be apprecitated if you can help me to figure out how to work this out, and I will rep if you want, thanks.

[SavageAnimal]

chains by laurie halse anderson

that book can any1 find it omfg please i cant buy this book because i couldnt find any link to full story is appreciated

[imanooo000ob]

i need someone to find a picture that depicts responsibility for me please. measly reps.

[DahStoryTella]

Solving Systems of Equations by Substitution

Question:

2x + y = 20
-5x + y = 13

I'm lost after switching the first line to 2x = 20 - y

Or, did I already mess up starting with that?

Do I not include the '2' when switching the equation?

My teacher gave us the answers, being 7 and 6. I'm not sure which one is x and which is y, but I'm sure it's just in order.

[Cell-Tech]

Solving Systems of Equations by Substitution

Question:

2x + y = 20
-5x + y = 13

I'm lost after switching the first line to 2x = 20 - y

Or, did I already mess up starting with that?

Do I not include the '2' when switching the equation?

My teacher gave us the answers, being 7 and 6. I'm not sure which one is x and which is y, but I'm sure it's just in order.

You're on the right track.

2x= 20 -y

x= 12 -y/2<---- this is what you replace x with in the second equation.

-5(12 -y/2) + y = 13<-- solve this for y. Use that solution in either of the other 2 equations to solve for x.

just solve

[noob2010]

Solving Systems of Equations by Substitution

Question:

2x + y = 20
-5x + y = 13

I'm lost after switching the first line to 2x = 20 - y

Or, did I already mess up starting with that?

Do I not include the '2' when switching the equation?

My teacher gave us the answers, being 7 and 6. I'm not sure which one is x and which is y, but I'm sure it's just in order.

for the first one, the numbers your teacher gave work... but not for the second

14 + 6 = 20

-35 + 6 =/= 13


I would work using the Y

2X + Y = 20 so Y = 20 - 2X

-5X + Y = 13 so Y = 13 + 5X

then

20 - 2X = 13 + 5X

20 - 13 = 5X + 2X

7 = 7X

1=X


then

2 + Y = 20

Y = 20 - 2 = 18


testing the second equation:

-5 + 18 = 13

13 = 13


so, it works...

[DahStoryTella]

Nice.

So, what I did was (This method got the answer my teachers gave me) :

2x + y = 20
6x - 5y + 12

=

y = -2x + 20
6x - 5(-2x + 20) = 12
6x + 10x - 100 = 12
16x = 112
16

[x = 7]

Then, for Y
2(7) + y = 20
14 + y = 20-14

[y = 6]

{(7,6)} Final answer.
Reps to both for the replies/help.

Good thread.

[Cell-Tech]

Nice.

So, what I did was (This method got the answer my teachers gave me) :

2x + y = 20
6x - 5y + 12

=

y = -2x + 20
6x - 5(-2x + 20) = 12
6x + 10x - 100 = 12
16x = 112
16

[x = 7]

Then, for Y
2(7) + y = 20
14 + y = 20-14

[y = 6]

{(7,6)} Final answer.
Reps to both for the replies/help.

Good thread.

I just realized when I divided 20/2 I accidentally typed 12 instead of 10. Didn't check your work, just letting you know in case you didn't catch it.

[deltron_3030]

hey brahs, simple physics question dunno why i cant get it

In traveling from the earth to Mars, determine at what distance (as measured from the earth) the gravitational force of the earth acting on the Spirit rover (m=174kg) is equal to the gravitational force of Mars on Spirit.

F(mars)=F(earth) amirite?

mg=G(m(earth)*m(rover))/r^2

left side being mars data and right side is earth
isolate for r.

why doesnt this work
ffuuuuuuuuuu

[semperfi122]

Any physics people out there? I'm terrible at physics....

Here is one problem:

A dog searching for a bone walks 3.50 m south, then 8.20 m at an angle of 30.0 degrees north of east, and finally 15.0 m west. Use graphical techniques to find the dog's resultant displacement vector.

[deltron_3030]

Any physics people out there? I'm terrible at physics....

Here is one problem:

A dog searching for a bone walks 3.50 m south, then 8.20 m at an angle of 30.0 degrees north of east, and finally 15.0 m west. Use graphical techniques to find the dog's resultant displacement vector.

draw out on graph paper to scale (1m=1cm). 3.5 down, 8.2 ne, 15 west.
draw a vector from the start to the finish point
measure line+angle
profit

[bananabucket]

Any physics people out there? I'm terrible at physics....

Here is one problem:

A dog searching for a bone walks 3.50 m south, then 8.20 m at an angle of 30.0 degrees north of east, and finally 15.0 m west. Use graphical techniques to find the dog's resultant displacement vector.

should be pretty easy as long as you have a concept of basic trig..

you're going to end up with a drawing something like the one attatched (sorry for the crappiness, i'm no MS paint artist)

using simple trig functions, you can find the lengths of the sides of triangle (with hypotenuse 8.2). you can then use the distances youre already given to find the remaining distances. for example, the X-component of the dog's displacement vector will be 15-x (x being the length of the top of the triangle). you can use this same method to determine the Y-component (which will be y-3.5). keep in mind that the X-component will be negative.

then again, i have no idea what "use graphical techniques" is supposed to mean.

[Airror]

Anyone?

Will rep a couple times

[bocheltree]

yo peeps. got some simple economics.

the 2 largest groups affected in a recession?

I've got the low wage workers who lose their jobs every trough in a cycle.

the other group?

reps

[Cell-Tech]

Anyone?

Will rep a couple times

What class is that? I could be way off here I don't think I've done a problem too similar to that before but I'll give it a shot.

That is a displacement function so we'll take the derivative to get velocity. I'll show vectors with bold faced font.

v = 5.20i + (e +2ft)j

Now we can figure out the direction of travel by forming a right triangle with the x and y component vectors and finding the hypotenuse. If we want the angle with respect to the x-axis, then tan(theta) = y/x

x = 5.20

y = e +2ft

tan(theta) = (e +2ft)/5.20

We can get some values by looking at the graph. At time=0, theta=35 degrees

tan(35) = e/5.20

e= 3.64

tan(theta) = (3.64 +2ft)/5.20

at time=14s, theta= 0 degrees

tan(0) = (3.64 +2f(14))/5.20

0 = 3.64 +28f

f= -0.13

Kind of at a loss for the units though. As far as I can tell the x component of position...which should be in meters is 5.20 times t in seconds. So it would just come out in seconds. Idk...

[aaronstamp]

yo peeps. got some simple economics.

the 2 largest groups affected in a recession?

I've got the low wage workers who lose their jobs every trough in a cycle.

the other group?

reps

my roommate is an economics major.
answer: middle class
reasons: because they lose the most money between their tax money and the decrease in output (that lowers their real wage because they produce less)

hope this helps. Any biology questions here? Honors Biology at UCR

[Toronto_BBer]

Grade 11 Physics question.

How do you convert a velocity - time graph to a distance - time graph. I know you need to find the displacement in the v-t graph, but how do you do that? Help

[Cell-Tech]

Grade 11 Physics question.

How do you convert a velocity - time graph to a distance - time graph. I know you need to find the displacement in the v-t graph, but how do you do that? Help

It's the area under the curve. If you have a straight line with a slope just use the triangle area formula, if you have a straight horizontal line just use the area of a rectangle formula.

If it's curving graph you either have to roughly estimate or use calculus.

[Toronto_BBer]

Searched it on google, but thanks for the help man, appreciate it. I have another question though, let's say i found the area of a straight line with a slope, for example the area is 2, and the time on the x-axis is 3. Would I graph it (2, 3) on the d-t graph?

Sorry If it sounds confusing, can't really explain it properly.

[BulgariaFitness]

Hey guys
i have a task to write a formal english letter. I'm supposed to be a student who is writing to a travel agency to request a competitive bid for travel arrangements for a group trip.

This is what i made from it, If you see any mistakes or if you can form a sentence in a better and more formal way, don't hesitate to help me
Thank you !

''
Dear Mr/Mrs,

I'm writing to you about a competitive bid for travel arrangements for a group of students who are going to visit your region soon.

We are a group of 10 students and 2 teachers from Belgium. We study tourism at school and we are planning to visit Normandy in April.
We prefer staying in a hotel because we've had previous visits to foreign places and we are used to this type of accomodation. We are trying to limit the total costs to 650 euro per student.

Could you send me a bid that includes a good and payable hotel, a transport possibility, some guided tours in Normandy and an insurance.

Thank you for taking time to read this mail and I look forward to hearing from you soon.


Yours Faithfully, ''

[Cell-Tech]

Searched it on google, but thanks for the help man, appreciate it. I have another question though, let's say i found the area of a straight line with a slope, for example the area is 2, and the time on the x-axis is 3. Would I graph it (2, 3) on the d-t graph?

Sorry If it sounds confusing, can't really explain it properly.

The area under the curve is the total distance traveled. Do you want to find the position at time 3?

[Cell-Tech]

hey brahs, simple physics question dunno why i cant get it

In traveling from the earth to Mars, determine at what distance (as measured from the earth) the gravitational force of the earth acting on the Spirit rover (m=174kg) is equal to the gravitational force of Mars on Spirit.

F(mars)=F(earth) amirite?

mg=G(m(earth)*m(rover))/r^2

left side being mars data and right side is earth
isolate for r.

why doesnt this work
ffuuuuuuuuuu

Force of gravity between earth and rover= GmE/R^2 where E is the mass of the earth, and R is the distance between earth and the rover

Force of gravity between mars and rover= GmM/r^2 where M is the mass of mars, and r is the distance between mars and the rover.

GmE/R^2 = GmM/r^2

reduces to E/R^2 = M/r^2

I'll call D the distance between earth and mars. so the R is the distance between the rover and Earth. r is the distance between the rover and mars which is equal to D-R

substituting D-R for r we now have:

E/R^2 = M/((D-R)^2)

R is the distance between earth and the rover which is what you're looking for...you can either google or probably just look in the appendix in the back of your book for the mass of mars, the mass of earth, and the distance between them. Solve for R. The algebra might get a little tricky, let me know if you need any more help.

[Toronto_BBer]

The area under the curve is the total distance traveled. Do you want to find the position at time 3?

oo you answered my question. Thanks for the help buddy. Do you got any tips at doing better at physics/math because I'm struggling a lot in those subjects.

[Cell-Tech]

oo you answered my question. Thanks for the help buddy. Do you got any tips at doing better at physics/math because I'm struggling a lot in those subjects.

Just gotta practice the problems till they're easy. Physics and math are subjects you can't really "study" for. You have to analyze and interpret each question differently, so it's all about practicing them to re-enforce the ideas.

If you need any help just pm me or post here I guess... i'm actually subscribed to this thread lol.

[Toronto_BBer]

Just gotta practice the problems till they're easy. Physics and math are subjects you can't really "study" for. You have to analyze and interpret each question differently, so it's all about practicing them to re-enforce the ideas.

If you need any help just pm me or post here I guess... i'm actually subscribed to this thread lol.

Ahaha, I thought so. Thanks for the help bro, I'll def post in here if I need help. I'm guessing you like physics, by your sig?

[TotalGymFreak]

Any UK law****s here?

Need to know arguments against the pleas of insanity and diminished responsibilty

I've got:

Epileptic people and diabetics are counted as insane if they have attacks IE epilepsy or hyperglycemic attacks, so it's not really fair

The law behind it dates back to 1853 M'naughten's case so it's old and outdated
The label itself.. Being labelled as insane carries a stigma through your whole life if you ever get out of the mental ward you're put it