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by little_dragon
Fri May 22, 2015 1:35 am
Forum: Intermediate Algebra
Topic: Substituting a Zero into a negative variable
Replies: 8
Views: 58

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: 26

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: 129

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: 253

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: 307

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: 438

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: 1048

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....
by little_dragon
Mon Dec 01, 2014 1:55 pm
Forum: Forum Rules & Guides
Topic: Pasting an image in a Post
Replies: 4
Views: 3085

Re: Pasting an image in a Post

That didn't seem to work for images stored on Google Drive. maybe google drive doesnt allow hotlinking?? try putting the image somewhere else & then link like they say here: http://www.purplemath.com/learning/faq.php#f3r3 heres a linked image: http://www.purplemath.com/modules/matrices/hand_ani...
by little_dragon
Tue Nov 18, 2014 2:47 am
Forum: Intermediate Algebra
Topic: Relationship between a square and a parabola?
Replies: 3
Views: 1069

Re: Relationship between a square and a parabola?

Moriarty wrote:I complete a "square", but when I graph that function the shape is a parabola.

the square Ur completing is (x - h)^2.
the x - h is squared so U have a "square" of a binomial.
its the power not the shape.
:wave:
by little_dragon
Tue Nov 11, 2014 12:23 am
Forum: Beginning Algebra
Topic: Simplifing radicals
Replies: 3
Views: 960

Re: Simplifing radicals

K_V8 wrote:(sqrt(16 - 64)) / 2
(sqrt(-48)) / 2
(sqrt(-4*12)) / 2
4i(sqrt(12)) / 2

how are U getting that sqrt[4] = 4??
to learn how roots work, try here: http://www.purplemath.com/modules/radicals.htm
then start w/ sqrt[4*4*(-3)]
:wave:

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