- Wed Oct 19, 2016 2:54 pm
- Forum: Matrix (Linear) Algebra
- Topic: Find >= 3 different elt's, adding, scalar-multiplying: [x,y]', x,y>=0
- Replies:
**1** - Views:
**9**

I am very confused on how to begin this problem. The image is blurry. I think it says this: Given: . . . V\, =\, \left\{\, [x,\, y]'\, \in\, \mathbb{R}^2\, :\, x\, \geq\, 0\, \mbox{ and }\, y\, \geq\, 0\, \right\} Present at least three different elements of the set V . After adding and scalar-...

- Wed Oct 12, 2016 11:44 pm
- Forum: Intermediate Algebra
- Topic: Gaussian Elimination: x+y+z=5, 2x+3y+5z=8, 4x+5z=2
- Replies:
**1** - Views:
**33**

there are arrows connecting the rows of numbers together. what's that all about? The arrows (which we can't see) are probably what they show here . Please help me. I have no idea how to solve this problem. How do I even start? Solve by Gaussian Elimination: x+y+z=5 2x+3y+5z=8 4x+5z+2 They were supp...

- Sun Jul 31, 2016 1:09 pm
- Forum: Beginning Algebra
- Topic: Larger numbers taking from smaller ones
- Replies:
**1** - Views:
**462**

What are the precise rules for the "interactions"?

- Thu Jun 16, 2016 1:33 pm
- Forum: Uncategorized
- Topic: Math learning software?
- Replies:
**3** - Views:
**500**

I think the MathHelp.com stuff is supposed to be pretty good. Purplemath endorses it.

- Mon Apr 18, 2016 4:44 pm
- Forum: Discrete Math
- Topic: Lone chooser problem
- Replies:
**1** - Views:
**809**

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...

- 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:
**454**

"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...

- Thu Apr 07, 2016 10:52 am
- Forum: Beginning Algebra
- Topic: factorization and grouping: 6t^7x^9 - 8x^4t^9 = 0
- Replies:
**2** - Views:
**459**

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...

- Mon Jan 25, 2016 8:21 pm
- Forum: Intermediate Algebra
- Topic: inverse proportion
- Replies:
**1** - Views:
**1108**

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...

- Thu Jan 21, 2016 1:40 pm
- Forum: Intermediate Algebra
- Topic: Horizontal Asymptotes
- Replies:
**1** - Views:
**736**

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 ...

- 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:
**1232**

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...