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? [more inside]
posted by arniec on Oct 2, 2009 - 16 answers

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]
posted by junipero on Sep 15, 2009 - 6 answers

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

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. [more inside]
posted by JoeXIII007 on Feb 11, 2009 - 4 answers

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

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... [more inside]
posted by fauxtoes on Oct 23, 2008 - 20 answers

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

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

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? [more inside]
posted by baphomet on Jun 17, 2008 - 4 answers

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: 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? [more inside]
posted by weston on Feb 18, 2008 - 18 answers

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

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

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

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

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

Please help my deaf mother-in-law learn Algebra. [more inside]
posted by unsupervised on May 2, 2005 - 5 answers

I'd like to learn Math. I'm particularly interested in learning trig and calculus. I'm don't need to learn these disciplines for any purpose. I'm just interested. I'm a reasonably bright guy, with a logical mind (I've worked as a programmer), and I'm a good self-learner. I'm not in a rush (don't mind working at this for a few years). What books/resources would you recommend? I should probably go all the way back to Algebra, which is pretty much where I left off in High School years ago.
posted by grumblebee on Dec 27, 2003 - 12 answers