# Activity Stream

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• Today, 05:15 AM
mmm4444bot replied to a thread Thanks? in Math Odds & Ends
You're welcome!! :-P As noted, by my comment in richiesmasher's first post, I had cropped and rotated the image, to remove everything which the OP...
1 replies | 20 view(s)
• Today, 05:00 AM
The graph of this function is a parabola that opens upward. Is there a typo? I think there are better models (i.e., those resulting in...
1 replies | 20 view(s)
• Today, 04:34 AM
We get better results by uploading three separate (cropped) images instead of combining three full pages into a single, very wide image. Most...
4 replies | 67 view(s)
• Today, 04:20 AM
My answer, proffered in alternate-clue form. :cool: Heraldic green tigon body is a real head-spinner (7)
1 replies | 53 view(s)
• Today, 01:59 AM
Wow! I'm a member and a lurker of a few technical forums around the web and I have to say that your post should be a 'sticky' on all of them. ...
14 replies | 3992 view(s)
• Today, 01:41 AM
Hi folks! I'm writing a program that will graphically move a ball along a series of parabolas to simulate the ball bouncing. I'm using a nested...
1 replies | 20 view(s)
• Today, 12:45 AM
radius of incircle of a right triangle = (sum of the 2 legs - hypotenuse) / 2 Yours is a special 30-60-90 right triangle. If short leg = a, then...
4 replies | 67 view(s)
• Today, 12:10 AM
The picture has too little resolution; but what I can make out from it looks as if you probably have a valid idea. Can you either post a better...
4 replies | 67 view(s)
• Yesterday, 10:32 PM
Please show your characteristic equation and explain why you did not get \lambda = 0 as an Eigenvalue.
1 replies | 26 view(s)
• Yesterday, 10:26 PM
You have answered my question for this single matrix. What does it mean for the Eigenvalues if you get EXACTLY the same Characteristic equation? ...
7 replies | 347 view(s)
• Yesterday, 08:34 PM
4 replies | 67 view(s)
• Yesterday, 08:24 PM
hi all came across a problem in my homework set which gave 3 eigenvalues and when I worked them through for the eigenvectors I got only 2 unique...
1 replies | 26 view(s)
• Yesterday, 05:44 PM
So I tried with the matrix B (first row 1,2 ; second row 3,4) so B' (first row 1,3 ; second row 2,4) and it gives me | λ I - B | = | λ I - B' | ...
7 replies | 347 view(s)
• Yesterday, 03:22 PM
Hello, I have the following problems: 1. Draw a right angled triangle of which an acute angle measures 60 degrees and the radius of the incircle...
4 replies | 67 view(s)
• Yesterday, 02:53 PM
Make that (w - 12)(w + 14) = 0
6 replies | 213 view(s)
• Yesterday, 02:41 PM
Another way is criss-cross multiplication (my favorite). (100*p - 4000)/(100*p) = 0.3 / 1 1 * (100*p - 4000) = .3 * 100*p 100*p - 4000 = 30*p...
5 replies | 106 view(s)
• Yesterday, 12:56 PM
What are your thoughts? Please share your work with us ...even if you know it is wrong.
1 replies | 34 view(s)
• Yesterday, 12:49 PM
You should have written it as: (100*p - 4000)/(100*p) = 0.3 There are multiple ways to proceed from here. My preferred next step would be - to...
5 replies | 106 view(s)
• Yesterday, 11:11 AM
We did prove that! Did you miss the "if ... then" in my answer? The work we do in solving shows that IF (S,U) is a solution, THEN it must be (25,...
10 replies | 252 view(s)
• Yesterday, 10:44 AM
Denis started a thread Thanks? in Math Odds & Ends
Rich, many thanks for a clear readable attachment. Happens in about 1 out of 1000 cases here :rolleyes:
1 replies | 20 view(s)
• Yesterday, 10:38 AM
2 + 3 = 5 ; we all agree 3 + 2 = 5 ; PROVE IT :rolleyes:
10 replies | 252 view(s)
• Yesterday, 09:05 AM
Hi richiesmasher, I understand that 7.5cm is the length of XY. For part (ii), note that the triangles XQY and SQR are similar, and the same...
1 replies | 62 view(s)
• Yesterday, 08:18 AM
Got a math question i need someone smarter than me to answer. I'm making a videogame, and need to have a monster jump to intercept the player. In...
1 replies | 34 view(s)
• Yesterday, 03:51 AM
So, Ok!This is what I understood from your explanation. First, we assume that equations =>S+U=90 and =>40S+25U=2625 are true, where S and U are its...
10 replies | 252 view(s)
• 12-15-2017, 11:05 PM
Hello, I have a question here which is giving me some problems. The question is in the picture below. I have already figured out number (i)...
1 replies | 62 view(s)
• 12-15-2017, 10:19 PM
Using those numbers, I was able to find the book online, and I see why you mentioned finding the solution without using Mathematica: that's how they...
12 replies | 242 view(s)
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