Converting one part of the equation into another

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Homework Help Overview

The discussion revolves around a mathematical problem involving the manipulation of equations to eliminate a variable, specifically 'h', from a set of equations related to motion under gravity.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to find a way to eliminate 'h' from the equations but expresses uncertainty about how to rearrange them. Some participants suggest equating expressions for 'h' or substituting one expression into another as potential methods.

Discussion Status

The discussion is ongoing, with participants providing hints and suggestions for rearranging the equations. There is a recognition of the need for algebraic skills, and while some guidance has been offered, the original poster continues to seek clarity on the rearrangement process.

Contextual Notes

There is an indication that the original poster may be struggling with foundational algebra concepts, which could impact their ability to engage with the problem effectively.

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Homework Statement


http://img90.imageshack.us/img90/8280/picture1mc2.png
In my answer guide, how do I eliminate h from the beginning part of this equation? Can someone give me hints to fill in the missing gap?

Homework Equations


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The Attempt at a Solution


I don't know how to get rid of h first. :(
 
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Rearrange one of the expressions so that they are both expressions for h. Then equate them (or just put them together) and you will have eliminated h.
 
I still don't know how to rearrange them D:
 
If you have never learned algebra, you are going to have a very difficult time through out this course since it clearly assumes you did. The first equation, h= (1/2)gt^2 is already solved for h. You can just replace h in the second euation, (2/3)h= (1/2)g(t- \Delta t)^2 by (1/2)gt^2. Or, doing as coffeem suggests, since h is multiplied by 2/3, you can multiply both sides by 3/2 to get rid of that 2/3.
 

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