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ZedBest ResponseYou've already chosen the best response.1
yes, so when you do that what will you get?
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
\[\frac{ab}{b}=\frac{c}{b}\] \[a=\frac{c}{b}\]
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Oh! now i get it, can you set up another example so i can try?
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Ok, divide ax with a, then divide c with a getting ax/a+y=c/a. You then simplify that getting x+y=c/a. Then you take both sides minus y getting x=c/ay
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
Really close but we need to either get rid of the y first before divide or also divide the y by a
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
YES! Thanks for teaching me :)
 2 years ago

abdul_shabeerBest ResponseYou've already chosen the best response.0
No, first start by subtracting y from both sides
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Alright, so ax+y=c ax=cy x/a=c/ay x=c/ay
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
remeber that when you divide the a you need to do it to all the terms
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
Inopeki got the answer i just put it in the equation maker for ease of the viewers
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
inopeki you need to write x=(cy)/a just to make it clearer. i see it now good work
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Thanks for the help :) Is there any way you can make it a little harder to give me a challenge?
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
yea i will come up with one for you
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
\[\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\] Solve for T_2
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.0
Nobody mentioned division by zero ?!!
 2 years ago

abdul_shabeerBest ResponseYou've already chosen the best response.0
Good observation @ Foolformath
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Well to begin with i need to multiply both sides with P2V2, getting P1V1/T1*P2V2, right?\[P _{1}V _{1}divT _{1}+P _{2}V _{2}=T2\]
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
I'll lay it out by steps for you
 2 years ago

abdul_shabeerBest ResponseYou've already chosen the best response.0
Cross multiplication
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
lcd = T_1T_2 \[T_2P_1V_1=V_2P_2T_1\] \[T_2=\frac{V_2P_2T_1}{P_1V_1}\]
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Oh right, i see it now. You wanted me to put the things i was multiplying by(V2P2) in by the other things that were multiplied. That would mean my answer is right, but yours is simplified.
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
No because you need to multiply both sides by the lcd of \[T_1T_2\] first then we cancel one of the varibles out because they are the same on top and bottom. then we can break T_2 apart from the rest of the left side by division, your answer would look close but in the end it would be wrong
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
What is an lcd? What makes T1 jump up?
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
lcd= lowest common denominator
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Is a denominator the 1 in T1?
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
The denominator is what is on the bottom of the fraction, so when we do the left side we get \[\frac{T_1T_2P_11V_1}{T_1}\] and because we have the same thing on the top and bottom we can cancel out the denominator leving us with \[T_2P_1V_1\] and we do the same operation on the right side
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Why do we get T1 on both sides of the line?
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
because you are multiplying by t1t2 but on each side one of them will cancell
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
Good job that was a hard one
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Thanks, when am i going to get to learn this in school?
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
Not sure when you will cover that but it's a chemistry equation compariing similar gasses to determine preasure, temp, or volume. You might touch it in highschool sometime.
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Oh, cool. What should i do now?
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
And then try this \[V=\frac{4}{3}\pi r^3\] Solve for r
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Divide both sides by rt, getting PV/rt=n, am i right? By the way, why is PV upper case?
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Zed, isnt that for volúmes of spheres or something? exept r should be ^3
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
good question and i don't have an answer for you but in that equation they are all upercase but the little n but i made a mistake and didn't capitilize the RT
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Zed, im going to do yours now.
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
yes you were right and that was the ideal gas law by the way
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Oh, that was a ^3! Divide both sides with (pi)r^2 getting V/(pi)r=4/3r, am i right sofar?
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
What does the law state?
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
okay so first step is to get r^3 by itself. what do you get?
 2 years ago

zbayBest ResponseYou've already chosen the best response.2
http://en.wikipedia.org/wiki/Ideal_gas_law
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Wait. I take back my first answer. First you divide both sides by 4/3(pi) to isolate r^3
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
good. have you done powers before and their inverses?
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
I think so, what do you mean?
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
okay so we have \[r^3=\frac{3V}{4}\] how do I get rid of the cubed part?
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Oh, i have done powers but i dont recall doing inverses, is that like squareroot and cubicroot? I guess we need to get the "cubicalroot" out of r^3.
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
We should be able to just divide r by r 2 times.
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
3* and by itself i mean the root.
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
not quite see let's try this example to help explain it \[x^2=4\]\[x=\sqrt{4}\]\[x=4^{\frac{1}{2}}\]\[x=2\]
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
What? Can you explain that?
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
okay so when we bring powers (eg 3) over the equation sign they turn to 1/powers (eg 1/3). if we look at squared when we bring it over it turns to 1/2 which is also known as the square root.
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
Why does it become 1/2?
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
the may be abit hard to follow but this is why. Let f(x)=y \[y=x^7\] \[\ln y=7 \ln x\] \[lnx=(lny)/7\] \[x=e^{(lny)/7}\] \[Inverse = f^{1}(x)=e^{(lnx)/7}\] \[ f^{1}(x)=e^{lnx^\frac{1}{7}}\]\[=x^\frac{1}{7}\]
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
Now usually when learning this we just accept this as fact that \[x^n=x^{\frac{1}{n}}\] where n is a positive integer
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
That was probably way too much information at once just use the rule in the above post and try to solve \[r^3=\frac{3V}{4}\]
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
So if r^2 becomes 1/2, then r^3 should become 1/3, right?
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
That means that i have to maake r^3 to 1/3 and convert 1/3 to 4/12(to merge it with the right side). i then convert the right sides fractions too, getting 9V/12. Now i should be able to merge them, right? so i get r=13/12?
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
I screwed that up right...
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
Sorry we want to raise both sides by the power of (1/3)
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
so the left hand side will be \[(r^3)^{\frac{1}{3}}=r^{\frac{3}{3}}=r^1=r\]
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
okay the right side is good. we have \[(\frac{3V}{4})^\frac{1}{3}\]
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
remember on the left hand side we had r^3 and when raised it to the power of 1/3 the powers need to be multiplied.
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
yes exactly it's one of the rules for powers. here are others if you wanted to learn and practice http://www.math.com/school/subject2/lessons/S2U2L2DP.html
 2 years ago

InopekiBest ResponseYou've already chosen the best response.3
So the answer is r^3*1/3=3V^3/4
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
yes and that simplifies to r=(3V/4)^1/3
 2 years ago

ZedBest ResponseYou've already chosen the best response.1
Well I'm off to sleep. I'll be on tomorrow if you want more examples or help :)
 2 years ago
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