## 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

My son is in grade 9 and is struggling with maths (this is an ongoing thing). Algebra is everywhere and he has no idea. What are the best online resources for stepping through algebra from the very beginning?
posted by h00py on Sep 1, 2015 - 6 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

## Where to get algebraic help?

I am working through the mooculus calculus one mooc as a refresher (which I clearly need), and there is one thing I have run across that I just don't see. Can you help me figure out what is going on, and what I can do to work out future problems?
posted by carpographer on Jun 17, 2014 - 5 answers

## Physics Study Guide

For my pal...What is a good physics study guide for: a) 1st semester algebra-based college physics b) lots of solved problems c) without calculus. I remember liking Schaum's in undergrad, but I seem to recall it being calculus based. Thx Hive!
posted by j_curiouser on Dec 15, 2013 - 4 answers

## Basic Math for Math Majors

Hello! I'm a first semester grad student in applied math. I am a non-traditional student in a variety of ways (liberal arts undergrad, working full-time), and while I'm finding that I intellectually understand the concepts I'm learning, execution is being made difficult by my lack of fluency with algebraic manipulation and calculus.
posted by downing street memo on Nov 13, 2013 - 16 answers

## 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.
posted by needlegrrl on Aug 5, 2013 - 8 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

## Need help finding an easy-to-follow Algebra textbook

Introductory Algebra Course - book recommendations?
posted by raintree on Oct 9, 2012 - 10 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

## Mr. Math Monster, I presume?

Help me to learn math as an adult when I still despise the frustrating beast from my childhood!
posted by DisreputableDog on Mar 24, 2012 - 20 answers

## Online mathematics

Which are the best online courses for studying algebra and progressing up to trig, calculus, and differentials?
posted by crapmatic on Feb 19, 2012 - 14 answers

## Simple solution

This is pretty straightforward algebra/chemistry which is why I'm embarrassed to ask my co-workers to help me so...
posted by Katine on Jan 5, 2012 - 8 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

## 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.
posted by wittgenstein on Jul 27, 2011 - 8 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

## CS Math books

I am a GIS college student looking to develop my skills in programming, particularly in Python. For starters, I need to wake up my dormant math skills. What mathematics-for-programmers books, or general Computer Science books, should I be looking for?
posted by ajax287 on Apr 10, 2011 - 9 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

## Equality Now! BBall Substitutions dilemma

MathStoryProblem: I coach youth bball and need help with equal playing time substitutions with a line-up that varies week to week. I think some kind of formula or counting trick should help, but my math skills are failing me. Up to 15 kids, 10 substitutions per game (25 min halves - subs every 5 min). As close to equal amount of floor time as possible (obviously, this can't always be the case).
posted by ten year lurk on Feb 23, 2011 - 6 answers

## 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?
posted by bearwife on Nov 19, 2010 - 12 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

## How do you say FOIL in other languages?

How do people explain the FOIL rule of algebra in other languages?
posted by twoleftfeet on Aug 23, 2010 - 31 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

## Solve for x

Is it possible to solve for x in y=(x^t)/(x-1), for any value of t? Wolfram alpha and maxima failed, so I guess not, but I'm interested in what more general classes of unsolvable equations this falls in.
posted by jewzilla on Feb 20, 2010 - 12 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

## Equidistant location from three locations?

What is the easiest way to calculate a location that is equidistant from three locations? (In this case: Baltimore, Chicago, Detroit)
posted by sharkfu on Jan 15, 2010 - 17 answers

## y = mx + b. Etc.

So I'm tutoring my cousin in algebra. Specifically, 9th grade algebra. Even more specifically, in preparation for the New York State Regents test in algebra. I'm 20 years older than he, and always found algebra pretty easy and straightforward. What tips do you have for a 34 year old tutor to a 14 year old who is struggling with algebra?
posted by dfriedman on Nov 7, 2009 - 10 answers

## Hopelessly lost in algebra land

I am having the hardest time working with positive and negative integers in elementary algebra. Please hope me.
posted by hollygoheavy on Oct 5, 2009 - 20 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

## Algebra tutor for placement test in the LA area

I have a friend who is looking for an algebra tutor in the Los Angeles area. Anyone have experience with one or know how to find one?
posted by Kimberly on Jan 7, 2009 - 4 answers

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