S.O.S. Mathematics CyberBoard

Your Resource for mathematics help on the web!
It is currently Sat, 25 May 2013 16:48:50 UTC

View unanswered posts | View active topics


Board index » High School and College Mathematics » Algebra

All times are UTC [ DST ]



Post new topic This topic is locked, you cannot edit posts or make further replies.  Page 1 of 1
  [ 12 posts ] 
  Print view Previous topic | Next topic 
Author Message
lynruss
 Post subject: y=100655x^-1.524
PostPosted: Wed, 8 Sep 2010 21:43:02 UTC 
Offline
Math Cadet

Joined: Wed, 8 Sep 2010 21:38:04 UTC
Posts: 5
Hi
Can someone help me rearrange the equation so that x is on the left instead of y?
Top
 Profile  
 
Shadow
 Post subject:
PostPosted: Wed, 8 Sep 2010 21:44:51 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
Post your question inside your post, not the title of it.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
lynruss
 Post subject:
PostPosted: Wed, 8 Sep 2010 21:56:18 UTC 
Offline
Math Cadet

Joined: Wed, 8 Sep 2010 21:38:04 UTC
Posts: 5
Hi
Can someone help me rearrange the equation y=100655x^-1.524 so that x is on the left instead of y?

Thanks!
Top
 Profile  
 
Shadow
 Post subject:
PostPosted: Wed, 8 Sep 2010 22:00:56 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
lynruss wrote:
Hi
Can someone help me rearrange the equation y=100655x^-1.524 so that x is on the left instead of y?

Thanks!


Start by taking dividing, then taking logs.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
lynruss
 Post subject:
PostPosted: Wed, 8 Sep 2010 22:07:38 UTC 
Offline
Math Cadet

Joined: Wed, 8 Sep 2010 21:38:04 UTC
Posts: 5
Thanks for your quick help!. Ive done the dividing:

now have y/100655 = x^-1.524

but not sure about the next bit. by logs do you mean logarithms? not sure I did those at school!
Top
 Profile  
 
Shadow
 Post subject:
PostPosted: Wed, 8 Sep 2010 22:08:43 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
lynruss wrote:
Thanks for your quick help!. Ive done the dividing:

now have y/100655 = x^-1.524

but not sure about the next bit. by logs do you mean logarithms? not sure I did those at school!


That's the only way to do it. Check out wikipedia for a primer on them if you perhaps have forgotten.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
Shadow
 Post subject:
PostPosted: Wed, 8 Sep 2010 22:09:45 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
lynruss wrote:
Thanks for your quick help!. Ive done the dividing:

now have y/100655 = x^-1.524

but not sure about the next bit. by logs do you mean logarithms? not sure I did those at school!


Alternatively, if all you want to do is have x on the left and not necessarily SOLVE for x, then just write the equation backwards.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
lynruss
 Post subject:
PostPosted: Wed, 8 Sep 2010 22:33:57 UTC 
Offline
Math Cadet

Joined: Wed, 8 Sep 2010 21:38:04 UTC
Posts: 5
Hi
I want to solve for X , basically I added a trendline to a graph which is represented by given formula and I want to use this formula to find x for any future given value of y.
Top
 Profile  
 
Shadow
 Post subject:
PostPosted: Wed, 8 Sep 2010 22:34:21 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
lynruss wrote:
Hi
I want to solve for X , basically I added a trendline to a graph which is represented by given formula and I want to use this formula to find x for any future given value of y.


Then you'll need logs.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
outermeasure
 Post subject:
PostPosted: Thu, 9 Sep 2010 06:30:17 UTC 
Online
Moderator
User avatar

Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6009
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
lynruss wrote:
Hi
Can someone help me rearrange the equation y=100655x^-1.524 so that x is on the left instead of y?

Thanks!


You have x^{-1.524}=\dfrac{y}{100655}, hence raising each side to the -\dfrac{1}{1.524}-th power...

_________________
\begin{aligned} Spin(1)&=O(1)=\mathbb{Z}/2&\quad&\text{and}\\ Spin(2)&=U(1)=SO(2)&&\text{are obvious}\\ Spin(3)&=Sp(1)=SU(2)&&\text{by }q\mapsto(\mathop{\mathrm{Im}}\mathbb{H}\ni p\mapsto qp\bar{q})\\ Spin(4)&=Sp(1)\times Sp(1)&&\text{by }(q_1,q_2)\mapsto(\mathbb{H}\ni p\mapsto q_1p\bar{q_2})\\ Spin(5)&=Sp(2)&&\text{by }\mathbb{HP}^1\cong S^4_{round}\hookrightarrow\mathbb{R}^5\\ Spin(6)&=SU(4)&&\text{by the irrep }\Lambda_+\mathbb{C}^4 \end{aligned}
Top
 Profile  
 
Denis
 Post subject:
PostPosted: Thu, 9 Sep 2010 10:08:33 UTC 
Offline
Member of the 'S.O.S. Math' Hall of Fame

Joined: Sun, 24 Jul 2005 20:12:39 UTC
Posts: 3692
Location: Ottawa Ontario
RULE: If x^p = y then x = y^(1/p)
You didn't know that?

_________________
I'm not prejudiced...I hate everybody equally!
Top
 Profile  
 
lynruss
 Post subject:
PostPosted: Fri, 10 Sep 2010 23:51:48 UTC 
Offline
Math Cadet

Joined: Wed, 8 Sep 2010 21:38:04 UTC
Posts: 5
Marvellous, thank you
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic This topic is locked, you cannot edit posts or make further replies.  Page 1 of 1
  [ 12 posts ] 

Board index » High School and College Mathematics » Algebra

All times are UTC [ DST ]

Who is online

Users browsing this forum: No registered users

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Contact Us | S.O.S. Mathematics Homepage
Privacy Statement | Search the "old" CyberBoard

users online during the last hour
Powered by phpBB © 2001, 2005-2011 phpBB Group.
Copyright © 1999-2013 MathMedics, LLC. All rights reserved.
Math Medics, LLC. - P.O. Box 12395 - El Paso TX 79913 - USA