Search found 200 matches

Go to advanced search

by little_dragon
Tue Jun 30, 2015 11:55 pm
Forum: Discrete Math
Topic: solve this difficult number sequence
Replies: 3
Views: 55

Re: solve this difficult number sequence

Is there a plausible solution for this number sequence? It was posted on another web forum a few years ago by somebody who claimed it came from an IQ test that he couldn't solve. Nobody has posted a reasonable solution. It's bugged me. It does not appear to have any pattern at all even after lookin...
by little_dragon
Fri Jun 19, 2015 5:18 pm
Forum: Beginning Algebra
Topic: Can't simplify rational expression
Replies: 1
Views: 103

Re: Can't simplify rational expression

one-and-one-is-three wrote:One from my coursework, tried a few tricks but cannot rumble it,



I wanted to factor the numerator, but thought it was prime?

yes its prime
factor the sum of cubes in the denom to get what cancels: http://www.purplemath.com/modules/specfact2.htm
:wave:
by little_dragon
Fri Jun 05, 2015 8:22 pm
Forum: Uncategorized
Topic: How do you keep notes for math class?
Replies: 2
Views: 194

Re: How do you keep notes for math class?

different people do it different ways
but handwriting is best apparently: http://www.scientificamerican.com/artic ... -a-laptop/
(i don't like to, tho!)
:wave:
by little_dragon
Fri May 22, 2015 1:35 am
Forum: Intermediate Algebra
Topic: Substituting a Zero into a negative variable
Replies: 8
Views: 248

Re: Substituting a Zero into a negative variable

TepNosreProgger wrote:Is that the lowest your equation will reduce? Can it be divided somehow?
Image
is my reducing legit?

is this from what the other poster did?
if yes, how did "24" turn into "-16"?
if no, where did this come from?
thnx
:wave:
by little_dragon
Tue May 19, 2015 2:24 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: How to linearize this constraint?
Replies: 1
Views: 122

Re: How to linearize this constraint?

I have a MILP model but one of my constraints is nonlinear and I need to convert it to some linear constraints. Assume that the constraint is like this: U-X*F=0 and U,X,and F are variables and I have these variables in other constraints also. I am trying to multiply a great M to some part till conv...
by little_dragon
Wed Apr 29, 2015 11:05 pm
Forum: Beginning Algebra
Topic: Please could someone help me to simplify this equation?
Replies: 1
Views: 234

Re: Please could someone help me to simplify this equation?

we are both uncertain of how to simplify this equation. The equation is 3t(t^2 + t) - t^2 multiply out the parentheses: http://www.purplemath.com/modules/polymult.htm, http://www.purplemath.com/modules/simparen.htm 3t(t^2 + t) = 3t(t^2) + 3t(t) = 3t^3 + 3t^2 then subtract out the other term: http:/...
by little_dragon
Wed Mar 04, 2015 3:47 am
Forum: Intermediate Algebra
Topic: help with a few problems
Replies: 1
Views: 337

Re: help with a few problems

some problems I need due before 12. need help! 1.graph by plotting: -7x+3y=-21 they show how to graph here: http://www.purplemath.com/modules/graphlin.htm 3.find the equation of line through (11,4) perpendicular to y = -8 they explain line eqns here: http://www.purplemath.com/modules/strtlneq.htm 4...
by little_dragon
Thu Feb 19, 2015 9:42 pm
Forum: Intermediate Algebra
Topic: Finding the size foundation that takes up all sidings of a tool shed
Replies: 1
Views: 394

Re: Finding the size foundation that takes up all sidings of a tool shed

Shawn is building a tool shed with a square foundation and has enough siding to cover 20 linear feet of walls If he leaves a 4-foot space for a door, then what size foundation would use up all his siding? Not sure how to approach this problem. A formula would also be nice. try using the formulas fo...
by little_dragon
Tue Feb 03, 2015 2:00 pm
Forum: Trigonometry
Topic: Trig help! 5cosx - 4sin^2x =2 w/o Pythagorean identities
Replies: 1
Views: 496

Re: Trig help! 5cosx - 4sin^2x =2 w/o Pythagorean identitie

I was wondering if anyone could help me with an extension trig question that we've been given as homework. We've not been taught Pythagorean identities yet. -360<x<360 5cosx - 4sin^2x =2 R U supposed to solve? if U cant use "cos^2 + sin^2 = 1" then i'm not sure how Ur supposed to do this?...
by little_dragon
Mon Jan 12, 2015 6:24 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: Difficult question
Replies: 7
Views: 1181

Re: Difficult question

i'm still stuck with the same situation where I have 0=16t^2-144t+180 and I cant get it simplified enough to solve for t. the best I'm able to break it down to is 4t^2-36t+45 which is where I get stuck. put the "=0" back in & solve the quad: http://www.purplemath.com/modules/solvquad....

Go to advanced search