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10 posts tagged with algebra *and* resolved.

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## 8th grade math tutoring options?

Where can we find low cost math tutoring for 8th grade algebra? I've tried some web searches, but have not had much luck. [more inside]

## Algebra: exotic identity values?

[mathfilter] please give me some example algebraic structures that are not commutative, with exotic identity values. [more inside]

## Can a transcendental number raised to an algebraic power be algebraic?

Can a transcendental number such as pi, be raised to an irrational, but algebraic power resulting in an algebraic solution? Complex solutions would be acceptable. There might be a quick proof here, or there might not be. - Thanks for any help you can offer answering this! (And I promise that this isn't for a class or anything like that!)

## Is it possible to solve for X?

## 1 + 10 + 100 + ... = -1/9

Mathfilter: In Gelfand's exceptional Algebra text, he is talking about the formula 1 + x + x^2 + x^3 + ... = 1/(1 - x). He uses the Achilles racing the tortoise model when first introducing the formula. He discusses the case x = 10, whence 1 + 10 + 100 + 1000 + ... = -1/9. [more inside]

## "New" math?

Multiple students taking an exam at different times come up with the same baffling answer. Help! [more inside]

## Can't Figure Out Why I Can't Figure It Out

Warning: wait to read this question until tomorrow if you are in Learned League.
So, today one of the Learned League questions was, What is the y-intercept of the line with the following equation?: 3y-11x = 39. I couldn't get any further than y = 13 + 3 2/3 x or y = 13 +3.66666x. Actually it appears the response is 13. How does one get to the right response for this question?

## Answering to Sir What is x

But Sir, what is x? Teaching students algebra for the first time. They keep wanting to put values in for x, and write that down.
E.g. x + x = . Becomes 1 + 1 = 2, in their books. Whereas I want x + x = 2x.
Does anyone have any strategies, or techniques to overcome this? [more inside]

## Is there a simple computer program I can use to graph functions?

Is there an easy-to-use computer program (other than TI Interactive) I can use to draw graphs of functions when I'm writing my Algebra 2 tests? [more inside]

## Maximizing a function over orthogonal matrices

Maximizing a function over orthogonal matrices, or: solving polynomial order 2 systems. Help me out or point me to a better forum / listhost. [more inside]

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