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by buddy
Sun Jul 31, 2016 1:09 pm
Forum: Beginning Algebra
Topic: Larger numbers taking from smaller ones
Replies: 1
Views: 419

Re: Larger numbers taking from smaller ones

What are the precise rules for the "interactions"?
by buddy
Thu Jun 16, 2016 1:33 pm
Forum: Uncategorized
Topic: Math learning software?
Replies: 3
Views: 450

Re: Math learning software?

I think the MathHelp.com stuff is supposed to be pretty good. Purplemath endorses it.
by buddy
Mon Apr 18, 2016 4:44 pm
Forum: Discrete Math
Topic: Lone chooser problem
Replies: 1
Views: 737

Re: Lone chooser problem

Al, Betty, and Carl divide a pizza, which they agree is worth $12. They get a half-cheese and half-mushroom pizza. They will use the Lone Chooser Method and Betty becomes the chooser leaving Al and Carl as the dividers. I'll be using the "Lone Chooser Method" they show in this PDF : i) on...
by buddy
Sun Apr 17, 2016 12:00 pm
Forum: Beginning Algebra
Topic: Need help on solving Linear Algebra And Its Application Problem Set 1.2 Problem 2
Replies: 1
Views: 422

Re: Need help on solving Linear Algebra And Its Application Problem Set 1.2 Problem 2

"Sketch these three lines and decide if the equations are solvable: x\,+\,2y\,=\,2 x\, -\, y\,=\,2 y\,=\,1 What happens if all right-hand sides are zero? Is there any nonzero choice of right-hand sides that allows the three lines to intersect at the same point?" I am having a hard time so...
by buddy
Thu Apr 07, 2016 10:52 am
Forum: Beginning Algebra
Topic: factorization and grouping: 6t^7x^9 - 8x^4t^9 = 0
Replies: 2
Views: 424

Re: simplifying equations

6t^7x^9 - 8x^4t^9 = 0 i have to simplify the above equation "simplify" or "solve"? can anyone please explain the method so that i can put it into action? simple factoring: http://www.purplemath.com/modules/simpfact.htm special factoring: http://www.purplemath.com/modules/specfac...
by buddy
Mon Jan 25, 2016 8:21 pm
Forum: Intermediate Algebra
Topic: inverse proportion
Replies: 1
Views: 1089

Re: inverse proportion

Please help! I am having a trouble understanding what steps to take to get the answer. They show the steps here . Suppose that y is inversely proportional to x and that y-7/8 when x=16. Is the "y-7/8" supposed to be "y = 7/8", "y = -7/8", or something else? I understan...
by buddy
Thu Jan 21, 2016 1:40 pm
Forum: Intermediate Algebra
Topic: Horizontal Asymptotes
Replies: 1
Views: 707

Re: Horizontal Asymptotes

I read the explanation on horizontal asymptotic but was wondering if there was a better way of finding out the asymptotic without observing a graph when the power of the numerator is smaller than the denominator. You mean here ? They just used the graph to explain the rule: If the power is smaller ...
by buddy
Sat Dec 19, 2015 1:34 am
Forum: Trigonometry
Topic: Solve equation for a roof loading: =[2 x (3/2)Cos(45) x 1] x 2.25
Replies: 3
Views: 1189

Re: Solve equation for a roof loading: =[2 x (3/2)Cos(45) x 1] x 2.25

So if RL is "Roof Load", W is "width of the bay window's opening in the wall", D is "depth of the bay window, or how far the window sticks out past the rest of the wall", and P is "the pitch angle of the roof, covering the two-floor building, where the bay window i...
by buddy
Tue Nov 03, 2015 12:10 am
Forum: Forum Rules & Guides
Topic: Log In
Replies: 1
Views: 2053

Re: Log In

If you figure out the answer, will you please let me know? it drives me nuts!
by buddy
Wed Oct 14, 2015 7:54 pm
Forum: Matrix (Linear) Algebra
Topic: Linear Algebra: Transposes
Replies: 1
Views: 812

Re: Linear Algebra: Transposes

Section 2.7. Problem 40: Suppose Q T equals Q -1 (transpose equals inverse, so Q T Q = I ). . . . (a) Show that the columns q 1 , ..., q n are unit vectors: || q i || 2 = 1. . . . (b) Show that every two distinct columns of Q are perpendicular: q i T q j = 0 for i != j . . ....

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