simple

  1. S

    Adding a fraction to a whole number in an algebraic equation

    Hello! :) I am going over another answer for a question on an online test: The only question I have is, how did they get 9/2? The way I'd go about solving this is making the -4 a -4/1, and then adding -1/2 to get 4/2. Where am I going wrong? Thanks in advanced! :) -Neo
  2. K

    simple computation problem?

    Another question from sosmath.com: f(x) = x^2 - 2x +3; find [f(a-b) - f(a)]/b And the answer given is 2a + b -2. I keep getting b - 2a + 2. I get it like this: ( (a-b)^2 -2(a-b) + 3 - [a^2 -2a + 3] ) / b ... ( a^2 -2ab +b^2 -2a + 2b + 3 - [a^2 -2a +3] ) / b ( a^2 -2ab +b^2 -2a + 2b +...
  3. topsquark

    Simple question about set members

    I am reading the intro chapter of "Basic Set Theory" by Levy. This is a question relating to Russel's antimony: \neg \exists y \forall x(x \in y \leftrightarrow x \notin x) , where x and y are sets. (They aren't classes since the chapter hasn't covered that yet.) I am confused a bit how any...
  4. E

    A simple question: can a linear transformation have the same matrix in different base

    Hi: can a linear transformation have the same matrix in different bases? I have spent a whole evening trying to figure out whether this can be to no use. What is certain is that given a base, I can define a linear ttransformation by giving it's values over a base. That is, there exists a...
  5. W

    Very simple Combination problem

    I don't know why I am wrong, help will be really appreciated! A bushwalking club has 80 members, 50 men and 30 women. A committee consisting of two men and one woman is to be selected. How many different committees are possible? I did 50C2 * 30C1 =36000 However, that was wrong. Sent from my...
  6. S

    Solve the differential equation by integration

    having some difficulty with this question help me please guys Solve the differential equation by integration: y' = y Solution is y = c ex but I dont understand it?
  7. O

    Very simple problem

    Hi Can some kind person help me out. I have some equations: t(n+1)=3t(n-1) + 4 and t(n)=3^(n)-2. I am to prove that t(n+1)=3^(n)-2. So I put: t(n+1)=3t(n) + 4 t(n+1)=3((3^(n)-2) + 4 Can somebody help me from here. I am not good at algebra and think I might be making a mistake in that...
  8. J

    Help with Matrices and Computer Graphics [Simple]

    Hi everyone! I'm writing a small 6–12 page assessment for my Grade 11 work (Math IA for the Diploma Programme) and I have chosen to write about an application of Matrices and how they can be used to translate, rotate, and scale different objects when working with computer graphics! I've found...
  9. I

    Simple percentages help

    I need to get total percentage complete of a level in my game given the end position and the players current position. I store the players starting position minus the end position in a variable once in the beginning into variable _totalDistance. and then once every frame the game is rendered...
  10. D

    Modular proof simple quick help

    If x ≅ y (mod n) and q ≅ z (mod n); then (x +q) ≅ (y + z) (mod n):, i know how to prove this, my question is if we wanted to prove it holds for (x + q) ≅ (y + z) (mod 2n): would this be true or false ?, if true how would i show it ? i know it should be simple but im confused.
  11. J

    Simple Question

    I had a problem recently. I solved it because it was quite simple, but I realized that I did not know (or perhaps did not remember) an efficient general method for solving such problems. Here was the problem. $Given\ \sigma = \dfrac{\pi + 1 - \upsilon(1 + \phi)}{\pi + \delta}.$ $\phi\ is\ a\...
  12. S

    Simple or challenging integral?, can't find table anywhere.

    I'm looking for solutions to the form \int \frac{cos(a/x)}{1-cos(a/x)}dx, where a is a constant. I've looked for tables that include that form but have found none. I've tried some guess and check functions but have found none yet. I don't have access to mathematica, maple, etc., atm to see if...
  13. M

    simple interest calculation

    formula is I =Pin p= principal I=interest rate n= number of time periods Question A major airline IS planning to purchase new airplanes. It wants to borrow $800 by issuing bonds. The bonds are for a 10-year period with simple interest computed quarterly at a rate of 2...
  14. N

    Another year 6 simple problem

    We need to prove that : 3^33 + 4^33 +5^33 < 6^33 Any idea how to start this one ?
  15. B

    V. simple Matlab plotting question

    Hi, As part of a bigger question I have to create a simple plot in Matlab. Could anyone tell me where I am going wrong in the simple script below: %Test Plot x=-2:0.01:4; D=sqrt(x.^2+(x.^2-2*x-4).^2); Plot(x,D); Kind regards Beetle
  16. B

    V simple graphing in Matlab Questions

    Hi, As part of a bigger question I have to create a simple plot in Matlab. Could anyone tell me where I am going wrong in the simple script below: %Test Plot x=-2:0.01:4; D=sqrt(x.^2+(x.^2-2*x-4).^2); Plot(x,D); Kind regards Beetle
  17. J

    Probably really simple question about math, and ICEEs.

    Hello everyone! This is my first question here. I hope I have used the correct forum group. This is probably really simple, but I just can't get my mind around it. I want to redeem "ICEE points" for ICEE stuff (ICEE stuff is the offical name for the products). I can pay for each item I am...
  18. A

    simple fractions just cant remember

    Hi; Why is (a - b) / (ab) = (b - c) / (bc) the same as (a - b)/(b - c) = ab / bc. Thanks.
  19. I

    How to write decimals as simple fractions (and other way round.)

    Can you just explain 'how to' turn decimals into fractions and fractions into decimals?(Itwasntme)
  20. J

    super simple stats question, but i'm stuck!! which test do i use?

    hello all :) basically i'm just finishing up a research project in which i am measuring whether a 6 week course of massage therapy was able to increase joint angle symmetry (measured at maximal flexion during walk) in 5 participants. i collected data at baseline, then weeks 3 and 6 i have run...