## Data Munge: Uknown combination of 7 numbers produces a given number.

Data Munging Pros: In a spreadsheet with ten data columns, Column "A" is related to columns "B" through "J" in that some unknown combination or interaction of some or all of them will produce the data in Column "A". How do we determine what that combination is? (I can't even find what this type of problem is called, and I've not been able to find any productive Google search terms.) A more thorough explanation/example is provided in-thread.
posted by jjjjjjjijjjjjjj on Jan 17, 2017 - 13 answers

## Let's play: math problems with a comm major!

I'm having trouble wrapping my head around a math equation I need to create, possibly because the data I have to cook something up with is less than ideal and only good for faking a preliminary number. Maybe you can help...
posted by DirtyOldTown on Feb 16, 2016 - 5 answers

## Typer Shark for Algebra?

I want to take a pre-calculus class, but I’m not prepared. I would find it easier to prepare with some kind of program or system to refresh my math skills and learn some of what I missed in high school. I, like most mammals, am motivated by immediate rewards. Is there an online game where the math gets progressively harder and you earn rewards for completing problem sets? I was more willing to practice typing when I was defeating sharks than when I worked from a book. Does such a gamified system exist for math?
posted by Catenation on Aug 25, 2015 - 4 answers

## How to Math

I'm a computer science major in college. I'm not a freakin' genius, but I do well-- get A's in my classes, good with abstraction (e.g. pointers), etc. However, I seem to have missed... my entire high school pre-Calculus math curriculum? I don't know.
posted by anonymous on Aug 14, 2015 - 13 answers

## Books/review of high school math for former math major, current tutor

I need book recommendations two categories: 1) for myself for review (that are somewhere between high school text books and Spark notes) 2) just straight up textbooks for high school math (algebra i, geometry, algebra ii, trigonometry, pre-calculus)
posted by miss so and so on Mar 5, 2015 - 10 answers

## Best cargo cult symbolic equation editor?

You're an armchair scientist and you like reading scientific papers. A lot of the fun ones include a lot of equations. You'd like to be able to recreate those equations in a virtual blackboard. You'd select terms and be able to replace them with a library of previous equations you've made. The blackboard would enforce whatever symbolic manipulation rules are required to maintain consistency (because you sure won't be able to). If you replace a term with a number or a data input, it does the calculations necessary to display properly. What is it?
posted by bigbigdog on Oct 18, 2014 - 9 answers

## Vicarious Math Pressure

My eldest child is starting high school. She is in the most advanced math class (a version of geometry) offered by her fairly demanding high school. But my eldest is struggling during the review of algebra -- rate problems, word problems, etc. Concerned because math is cumulative, and I don't want her falling behind. What can I do to help, both with math and with preventing her from becoming discouraged?
posted by Slap Factory on Oct 10, 2014 - 9 answers

## 4x+y+2z=100, x>y, y>z, x+y+z=j, 3x+z=k, j>k, j+k=100.

4x+y+2z=100, x>y, y>z, x+y+z=j, 3x+z=k, j>k, j+k=100. WolframAlpha can only give me alternative forms or a solution involving 'real and imaginary parts of z'. Is there a solution I can count on my fingers?
posted by obiwanwasabi on Jul 22, 2014 - 13 answers

## Scale my function for a line graph

Math-filter: I have a line chart in Google Docs that plots three columns of data over time. Data in the first two columns ranges from 0-1000, but data in the third column ranges from 3-9. I'd like to "scale" Line 3 (maybe this is the wrong word?) to be able to compare its value over the same graph space as Lines 1 and 2.
posted by electric_counterpoint on Jun 12, 2013 - 7 answers

## Algebra: exotic identity values?

[mathfilter] please give me some example algebraic structures that are not commutative, with exotic identity values.
posted by knz on Apr 8, 2013 - 5 answers

## 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!)
posted by ch3cooh on Mar 2, 2013 - 3 answers

## Clearly, this proves that I'm stupid

I can't seem to wrap my mind around the language of higher level math. Definitions, theorems, and proofs make me fall asleep, but I really do want to understand. Do you know of any good resources that can help me out?
posted by lucia_engel on Jan 31, 2013 - 19 answers

## The use of Linear Algebra in Programming.

I just finished my first course in Linear Algebra. I know a fair amount of Python. Please help me come up with a project that combines the two.
posted by lobbyist on Dec 23, 2012 - 11 answers

## Algebra Question

Can anyone help with an algebra question I am trying to help my neice with her homework.
posted by Summer Fall on Nov 17, 2012 - 9 answers

## Help her learn Alg II by Tuesday

Sister just learned she has to take an Algebra II test on Tuesday that covers the whole shebang. She's forgotten (repressed?) most of it. What's her best bet for an Algebra II crash course that will go over all the topics? She's very smart, but not a math person.
posted by goosechasing on Aug 30, 2012 - 11 answers

## My Trig Teachers Name Was Mr. Angle But That Didn't Make Him A Good Teacher.

My math skills are no where near where I'd like them to be. Can you recommend a self-paced math learning site? Pretty much any branch of math can apply.
posted by Ookseer on Aug 13, 2012 - 7 answers

## Math is Hard (I need help)

posted by anastasiav on Jul 22, 2012 - 11 answers

## Is it possible to solve for X?

(Y)(S^N) = (M)(X^(N+E)) - (Y)(X^N) Is it possible to solve for X?
posted by spacediver on Apr 25, 2012 - 24 answers

## I still KNOW the quadratic equation, just not what it means

I have forgotten basically all of math, and I want to learn it again from the ground up.
posted by showbiz_liz on Oct 19, 2011 - 28 answers

## Linear Relationships in Real Life?

I am redesigning a high-school Algebra course so as to make it more meaningful to the students. To that extent, I am trying to gather as many examples throughout our world of linear relationships. I was hoping to tap into the collective wisdom of this group to come up with as long a list as possible of linear relationships that actually exist (not contrived stuff). I once knew a teacher who had a plant that grew at a linear rate. I don't know the type of plant, however. And there are so many other linear relationships around us. I don't want everything they see be about a car's distance from home or the amount of money they saved. What do you know of that exhibits a linear relationship? I'd love to have a long list for students so that they see that studying linear relationships in Algebra really does matter. Thanks for any help in making this course more worth while to the students!
posted by mathmatters on Jul 21, 2011 - 16 answers

## If an geeky child is traveling South at 839 MPH, and his nerdy dad is going North at...

My son, who is finishing up third grade, loves math and especially the basic Algebra he's been doing. He is actually sad to be leaving school for the summer because he's so into it. How can I keep this going for him over the summer? Fun books, board games, computer (on-line and OSX) games?
posted by bondcliff on Jun 8, 2011 - 42 answers

## "New" math?

Multiple students taking an exam at different times come up with the same baffling answer. Help!
posted by King Bee on Mar 21, 2011 - 24 answers

## How to manipulate "12 = x - (square root of x)" into "x="

The solution to 12 = x - (square root of x) is 16, but how do I manipulate the equation to show that?
posted by Wanderboy on Feb 23, 2011 - 47 answers

## 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?
posted by 92_elements on Nov 11, 2010 - 23 answers

## I am sick of having to say "I'm not good at math."

I have always had difficulty with mathematics. Now I'm in my mid-thirties and have gone back to school to study engineering. Things are not going appreciably better than they did the first time I went to university. What can I do to fill the gaps I have and become a skilled problem-solver? I want to go from being a C to being an A student.
posted by rhombus on Mar 24, 2010 - 30 answers

## Do we have to know Cramer's rule for the exam?

Why do people care about Cramer's rule?
posted by leahwrenn on Mar 3, 2010 - 8 answers

## A good book for teaching yourself algebra?

Any recommendations for self-teaching guides to high school level math?
posted by LastOfHisKind on Jan 23, 2010 - 12 answers

Not Homework Filter! Paypal Filter: Paypal charges me 2.9% plus \$0.30 for every transaction. Someone needs to pay me X. What is the formula to determine how much they need to send with paypal so I get X and not X - (X * 0.029) - 0.30?
posted by arniec on Oct 2, 2009 - 16 answers

## 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?
posted by junipero on Sep 15, 2009 - 6 answers

## Algebra help with roots

I need help with a math problem my sister-in-law has for homework. It involves adding and multiplying roots and it's been long enough since college that I don't quite remember how to do that. The question is: 3sq(5)[2sq(5)-5]. I did it two different ways, getting 15sq(5) once and 9sq(5) the next. Is either right? An answer would be appreciated and, moreover, an explanation as to how to do it. Thanks!
posted by dbooster on Jun 10, 2009 - 7 answers

## Math basics need be strengthening

In need of some daily source of random math problems (upto basic calculus) that will reinforce or (if necessary) re-establish some real fundamental concepts in the algebra portions of calculus, unless something else might work.
posted by JoeXIII007 on Feb 11, 2009 - 4 answers

## 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.
posted by a robot made out of meat on Oct 26, 2008 - 15 answers

## How to use algebra to solve web design grid issue?

I have a super-complicated algebraic equation I (somehow) developed as the solution to developing appropriate grid-based web design that has me completely stumped...
posted by fauxtoes on Oct 23, 2008 - 20 answers

## Help me do sums.

Stupidly simple math question.
posted by Mwongozi on Sep 24, 2008 - 10 answers

## Help me relearn mathematics and its practica applications

Applied Math Filter: Help me use math! I'd like to learn more about mathematics and it's practical applications - particularly in Computer Science
posted by dcbarker on Aug 1, 2008 - 13 answers

## Help me get my math on

I need to brush up on my basic college math skills for a course readiness assessment in a week. What are some good resources online and what should I focus on?
posted by baphomet on Jun 17, 2008 - 4 answers

## Algebra for Social Scientists

I tutor several people in a "Mathematics for the Social Sciences" course at a local university. This semester the material is focused on matrix algebra. For the most part, they have no trouble wrapping their heads around the notions of basic vector operations, row reduction, systems of equations, inverse matrices and determinants. But, they have a lot of problems with more abstract concepts such as linear independence, subspaces, basis and dimension. I'm wondering if anyone has any tips on helping them visualize and understand these ideas more clearly.
posted by Proginoskes on Mar 30, 2008 - 7 answers

## Color algebra: How do I pick a color F will make known color C against known background B at opacity N?

Color algebra: Given a color C, how do I pick a color F that will be color C when against background color B at opacity N? How would I do the same thing for a color multiplication?
posted by weston on Feb 18, 2008 - 18 answers

## Make a function of this graph. That's like an anti-graph!

Help me create a function from a graph, details inside.
posted by hammerthyme on Nov 22, 2007 - 6 answers

## How to write a mathematics paper

I need to write a document with a lot of algebraic formulas. What word processor / page layout program would make this quickest and easiest?
posted by rolypolyman on Jun 18, 2007 - 25 answers

## Self-teaching algebra

I'm looking for textbook suggestions for teaching myself algebra and trigonometry. Are there any algebra textbooks that stand out as exceptionally good?
posted by rolypolyman on Feb 21, 2007 - 7 answers

## Can ya help me be geeker?

Can you help me with my innumeracy?
posted by horseblind on Jul 23, 2006 - 16 answers

## Practical math

Math help. (Practical, I'm not in school!)
posted by Mwongozi on Jun 28, 2006 - 7 answers