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by little_dragon
Mon Jul 20, 2015 4:51 pm
Forum: Beginning Algebra
Topic: Find the savings plan balance after 18 months with an APR of 7% and monthly payments of $150.
Replies: 1
Views: 105

Re: Find the savings plan balance after 18 months with an APR of 7% and monthly payments of $150.

I need help but Im not sure what category the math problem that I am trying to solve goes under. There are three questions that I am trying to solve. Question 7: Find the savings plan balance after 18 months with an APR of 7% and monthly payments of $150. the balance is $ Do not round to the final ...
by little_dragon
Wed Jul 08, 2015 1:56 am
Forum: Beginning Algebra
Topic: Exercises
Replies: 2
Views: 137

Re: Exercises

OK, now I have the purplemath CD. I don't see any exercises on the CD tho or worksheets. U mean U got this?: http://www.purplemath.com/lessoncd.htm it says "the entire Purplemath web site, modified for offline viewing." there arent any worksheets/exercises/etc on the site i think?? :wave:
by little_dragon
Tue Jun 30, 2015 11:55 pm
Forum: Discrete Math
Topic: solve this difficult number sequence
Replies: 3
Views: 224

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: 186

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: 315

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: 328

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: 174

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: 289

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: 380

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: 439

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...

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