Troubling math!

[RD4life]

Hello there, I am RD4life, and I am terrible at maths. I need help with my math homework to get a good grade in 2 days. I'll be making excercises myself, and if I have no clue what I am doing, I'll ask for help. We've already done some math on the zombie server, and math with a few people over the internet is actually pretty fun! *I'll be turning the thread into something real, using gradually more difficult problems, just to have fun! **I horribly failed the test... Q_Q

6+y=3/t with T=x-5
Express X in Y.

NEW PROBLEMS!

1/5p+3=3/10p-8

15/2x-1=3

2(q=1)=4p-5 (Express P in Q)

q+8-1/p+6=0 (Express P in Q)

Good luck y'all!

 

[Vatowski]

Get a tutor

 

[Shinyshark]

I'd help you but I have no idea what to do

 

[Notme]

Lemme do some maths XD

6+y=3/t with T=x-5
Express X in Y.

6+y=3/t | t=x-5

6+y=3/(x-5) | -6 (subtracting 6 from both sides)
y=(3/x-5)-6

Derp

 

[Vatumok]

Raxo, you expressed Y in X instead of X in Y.

Anyway...
6 + y = 3/T
--> Fill "x - 5" in for T.
6 + y = 3/(x-5)
--> Apply math rules to displace the division.
3/(6+y) = x - 5
--> Add 5 on both sides.
x = 3/(6+y) + 5

 

[RD4life]

6 + y = 3/(x-5)
3/(6+y) = x - 5

What happens here Vatumok

 

[Vatumok]

It's a math rule that if "a/b = c" then "a/c = b" and "b * c = a". This can easily be shown with an example.

Take for this example a = 6, b = 2 and c = 3.​

6/2 = 3 and 6/3 = 2 and 3*2 = 6.​

​

In the case of this problem a = 3 and b = (x - 5) and c = (6 + y).

 

[RD4life]

I will be updating the original post in a few minutes with 3 new mind boggling math problems. :c

 

[Defiant_Blob]

6 + y = 3/(x-5)
3/(6+y) = x - 5

What happens here Vatumok

Vatumok you messed up
It should be multiply both sides by (x-5), not 3.
You'd get (x - 5)(6 + y) = 3

 

[Vatumok]

Vatumok you messed up
It should be multiply both sides by (x-5), not 3.
You'd get (x - 5)(6 + y) = 3

Well, you can also do it this way and then divide both sides by (6+y) so that you get to the same answer. It's normal to skip this step though.

 

[Defiant_Blob]

Ehm, what would be the point of that? ;o

Well, you can also do it this way and then divide both sides by (6+y) so that you get to the same answer. It's normal to skip this step though.

Well, the fact that it's actually possible.

6 + y = 3/(x-5)
3/(6+y) = x - 5
This transition isn't possible. What exactly did you do here? Multiply both sides by 3? Divide by 3? Nope. Then why is 3 on the left side???

 

[Vatumok]

I always use the math rule that I explained a few posts before. But you can also do it in your way.

Multiply by (x-5) so you get "(x - 5)(6 + y) = 3" and then divide both sides by (6 + y) so that you get "((x-5)(6+y))/6+y) = 3/(6+y)" which is "x - 5 = 3/(6+y). This step is usually skipped though because it wastes time.

 

[Defiant_Blob]

Well, it's better to explain the steps when you're helping someone with math x)

 

[Vatumok]

I prefer to skip it and explain the math rule, that way it looks way more complicated and messy (especially over the internet) and it can save a lot of time if you do it the simple way

 

[Dess]

I never knew vatu was a math person XD I always assumed he was a sciencey person.

 

[paceboys]

I never knew vatu was a math person XD I always assumed he was a sciencey person.

same here

 

[Terre936]

Uhhhhh...ok

 

[Jayfeather]

^
5char

 

[Duffie]

I'm a bit late to the party, but I love math, so I'm going to try it anyway.

6+y=3/t with T=x-5 Express Y in X

6 + y = 3 / t
6 + y = 3 / (x - 5)
*3 *3 *3
18 + 3y = 3x - 15
-18 -18
3y = 3x - 33
/3 /3 /3
y = x - 11

... Did I get it?

Edit : I feel like I messed this up, just because I have no idea what to do with the dividing of the distribution, which is something I haven't faced.

Time to go to Google to find this out, because... Math.

Edit Edit : Well, it's kind of hard to find this via Google.

 

[Defiant_Blob]

I never knew vatu was a math person XD I always assumed he was a sciencey person.

You have to use math to accomplish science

 

[ReyvnNova]

This thread makes me sad because it reminds me how terrible I am at math.

 

[Vatumok]

Duffie
3 times (3/(x-5)) is not 3x - 15 but 9/(x-5).

You would get an answer like this
6 + y = 3 / (x - 5)
3(6 + y) = 3(3 / (x - 5))
18 + 3y = 9 / (x - 5)
9/(18 + 3y) = x - 5
x = 9/(18 + 3y) + 5.

 

[Tuna]

how about find the first derivative of f(x)=x^3(sin(x))? :D?

 

[Duffie]

how about find the first derivative of f(x)=x^3(sin(x))? :D?

Graphing calculator.

 

[Da Jinks]

I never knew vatu was a math person XD I always assumed he was a sciencey person.

Mathematics is the language of Science :)