Questions Asked on
July 12, 2007

  1. Diagonalize

    construct a nondiagonal 2 x 2 matrix that is diagonalizable but not invertible. Just write down a diagonal matrix with one zero on the diagonal and then apply an orthogonal transformation. E.g. if you start with the matrix: A = [1 ,0 0,1] And take the

    asked by Jeff
  2. Algebra

    Would someone please check these answers? Simplify. 3/x-5+1/1-4/x-5 For this answer I got: x-2/x-9 Divide. x^2-49y^2/6x^2+42y/(x^2-7xy) For this answer I got: (x+7y)/6x(x^2+7y) Add. Express your answer in simplest for. x/6+3x/6 For this answer I got: 2x/3

    asked by Linda
  3. Algebra

    Can someone verify if my answers are correct? Solve. 1/x+6-1/x-6 My answer is: -12/x^2-36 Solve. 1/x+5+2=5/x+5 My answer is: -3 Subtract. Express your answer in simplest form. 13x/30-4x/15 My answer is: x/6 Can someone verify if my answers are correct?

    asked by Need Help
  4. Econ

    The economy contains 2000 $1 bills. a) If people hold all money as currency, what is the quantity of money? b) If people hold all money as demand deposits and banks maintian 100 % reserves, what is the quantity of money? c) If people hold equal amounts of

    asked by Ed
  5. Math/Calculus

    Please check my work and correct any errors/point out any errors. Thanks. Solve the initial-value problem using the method of undetermined coefficients. y''-4y=e^xcos(x), y(0)=1, y'(0)=2 r^2-4=0, r1=2, r2=-2 yc(x)=c1*e^2x+c2*e^-2x

    asked by COFFEE
  6. Math/Calculus

    A series circuit contains a resistor with R = 24 ohms, an inductor with L = 2 H, a capacitor with C = 0.005 F, and a generator producing a voltage of E(t) = 12 sin(10t). The initial charge is Q = 0.001 C and the initial current is 0. (a) Find the charge at

    asked by COFFEE
  7. sports

    I want to know about cricket sport. Can you tell me something about cricket sport. What do they do.. how they play it. The "sport called cricket" is better phrasing, not "cricket sport" -- http://en.wikipedia.org/wiki/Cricket =)

    asked by singh
  8. Math

    x^2+x-k find all positive values for k, if it can be factored Allowed values of k for for the expression to be factorable with integers are a*(a+1) where a is an integer equal to 1 or more. For example: 2, 6, 12, 20... The factors are (x-a)(x+a+1) There

    asked by Sean
  9. Kids health questions

    Is spina bifida caused by a spinal cord injury or birth trauma? Are hemiplegic children impaired on one side or on both sides? Spina bifida: http://en.wikipedia.org/wiki/Spina_bifida hemiplegic: http://en.wikipedia.org/wiki/Hemiplegic More than just

    asked by Shellie
  10. maths

    A man invested Rs30000 in two types of bonds.On one he earns 5% and on the other he gets 75.If his total earnings are Rs2000,find his investment in each type of bonds.Pls answer this question with required steps. earnings= amount1*.05 + amount2*.075 you

    asked by meera
  11. maths

    how do i solve this equation? 2/(x+1)=1/(x-1) - (1/(2x-1)) thx Get a common denominator (x+1)(x-1)(2x-1) then, each term, multipy it out. Gather terms, solve.

    asked by Emma
  12. Algebra

    A rectangle garden is to be surrounded by a walkway of constant width. The garden's dimensions are 30ft by 40ft. The total area, garden plus walkway, is to be 1800ft^2. What must be the width of the walkway to the nearest thousandth?

    asked by Michelle
  13. English

    Do you understand why "defines" is correct? Even though "Baskin-Robbins" appears to be plural (with the -s on the end), it's singular because it's the name of one company. Therefore, the verb needs to have the third-person-singular ending (-s) when in

    asked by Writeacher
  14. Early Child Ed.

    Can you please check my questions and answers? 1. A three-year-old child who is developmentally delayed might: A. need training wheels on his two-wheel bike. B. speak in two-word sentences C. not be able to read. D. need someone to help cut his meat at

    asked by Tamera
  15. Algebra

    Solve. x-3/15=1/3 I get 8 as an answer. Is this correct? If you substitute 8 for x, you'll find that 8 is not the correct answer. x - 3/15 = 1/3 x = 3/15 + 1/3 x = 3/15 + 5/15 x = ______ Please post your answer and a teacher will be glad to check it. Does

    asked by Linda
  16. Algebra

    Solve by using the quadratic formula To get help, you need to give more specific data. Please repost with the specific information. Thanks for asking.

    asked by PLEASE HELP
  17. English Grammar

    How do you write Douglas Adams in the plural tense? Is it Adams' or Adams's or Adamses? I don't know which one to use when? Please help! Also, why are the Norman High School Library computers blocked? We block computers that are habitually used for

    asked by Summer
  18. science(chem&statistics)

    I have to write a abstract for my paper I was wondering if it was better to write it at the beginning or the end of the lab report. If I was to eliminate 1 value as an outlier would I go and include that in calculations of the RSD? I would assume not since

    asked by christina
  19. grammar

    does this sentence make sense? how can I make it better? A man determined to find love through the internet finds out that love is staring him in the face the whole time.Thanks How about this? Determined to find love through the Internet, a man finds that

    asked by erin
  20. algebra

    solve and check the equation for x. I just can not figure this out. 5/x+6 + 2/x^2+7x+6 = 3/x+1 Thanks! Use parentheses to tell us whether you mean 2/(x^2 + 7x + 6) or 2/x^2 +7x +6 and also whether you mean (3/x) + 1 or 3/(x+1) and also (5/x)+6 or 5/(x+6)

    asked by jamie
  21. Math/Calculus

    Solve the initial-value problem. Am I using the wrong value for beta here, 2sqrt(2) or am I making a mistake somewhere else? Thanks. y''+4y'+6y=0, y(0)=2, y'(0)=4 r^2+4r+6=0, r=(-4 +/- sqrt(16-4(1)(6))/2 r=-2 +/- sqrt(2)*i , alpha = -2, beta = 2(sqrt(2))

    asked by COFFEE
  22. maths

    how do i solve this equation? 21(X-(1/7))^2= 3/7 thx Divide both sides by 21 Take the square root of both sides. Rewrite it as x - (1/7)= sqrt [(1/21)*(3/7)] = sqrt[(1/7)*(1/3)(1/7)] = (1/7) sqrt(1/3) x = (1/7)[1 + sqrt(1/3)] tahnks x=(2)/(7),0

    asked by Emma
  23. algebra

    multiplication of algebraic expressions. I searched Google under the key words "multiplication 'algebraic expressions'" to get these possible sources: http://www.intmath.com/Basic-algebra/2_Multiplication-algebra.php

    asked by klar maesen
  24. Algebra

    Solve by using the quadratic formula. 3x^2=11x+4. Look up the formula if you don't know it already. In this case a = 3, b = -11 and c = -4. You get that by rewriting the equation in the standard form ax^2 + bx + c = 0 , where a, b, and c are constants.

    asked by Shaye
  25. Algebra

    Solve by using the quadratic formula x^2=-7x+12 First, put all the terms on one side. x^2=-7x+12 x^2 + 7x -12 = 0 If the original sign for the 12 were negative, this would lead you to: x^2 + 7x + 12 = 0 This could factor into: (x+3)(x+4) = 0 However, as

    asked by PLEASE HELP
  26. Science

    How are eukaryotic cells similar to a production line? Thank you for using the Jiskha Homework Help Forum. Here are some sites on these cells: 1. http://en.wikipedia.org/wiki/Eukaryote 2. http://library.thinkquest.org/C004535/eukaryotic_cells.html 3.

    asked by Marie
  27. Algebra

    x^2+2x-15/4x^2/x^2-25/2x-10 You need to use parentheses to clarify the meaning of what you wrote. You can't have a four-story fraction with three / signs x^2+2x-15 factors into (x+5)(x-3) There is also an (x+5) factor in x^2-25,and an (x-5) factor in

    asked by Need Help
  28. math

    x^2-9x-4=6 solve by completing the square show steps plz :D Add 4 to both sides. What is 1/2 of -9? Then square that, and add it to both sides. Now, on the left, you have a perfect square.. (x-9/2). Take the square root of each side. Remember the right

    asked by kayla
  29. math

    use the quadratic formula to solve this equation. 4x^2-8x+3=5 use the formula x=-b + or - the sqrt of b^2-4ac/2a yes, the 2a divides into all. Memorize it.

    asked by kayla
  30. English

    parrots,those life spance is no longer than 20 year.... is the use of the term "no longer" correct in this sentence? or is there any other mistakes in this sentence? thx. There are several spelling and word choice errors, an error of fact, AND it is not a

    asked by Jarin
  31. English

    Is this a good outline for now? for my book Down and Out in Paris and London I. Introduction A. Catch Sentence: Why did George Orwell have such a suffering experiences in his life? B. General Information: George Orwell’s pen name of Eric Blair was born

    asked by Ngo
  32. english

    "Either you are for me or agsinst me." is this a hasty generalization, begging the question, faulty cause, false dilemma, or faulty analogy. can some 1 help me http://academic.cuesta.edu/acasupp/as/404.htm Scroll down and check out the either/or

    asked by renegade
  33. Algebra

    The height h in feet of an object after t seconds is given by the function h=-16t^2+70t+5. How long will it take the object to hit the ground? Round your answer to the nearest thousandth. If that is the function, you need to have a value for the height to

    asked by Angela
  34. Algebra

    Find the x-intercepts. y=x^2-4x+4. Thanks for helping. All of this Algebra has lost me.

    asked by Cindy
  35. Algebra

    Can someone please help!!! These equations are confusing me so. x^2-98=0 x^2 - 98 = 0 x^2 = 98 x^ = 98/2 x^ = 49 x = _____ If you post your answer, we'll be glad to check it. 7

    asked by Shannon
  36. Algebra

    Can someone help. Solve by completing the square. x^2=5x+2 x^2 -5x -2 = 0 x^2 - 5x + (5/2)^2 -2 = (5/2)^2 (x- 5/2)^2 = 2 + 25/4 = 33/4 x - 5/2 = sqrt (33/4)

    asked by Elaine
  37. human services

    what are some ethical dilemmas that occur in health care or human service organizations? There are many ethical dilemmas from perspective, epsecially in my hometown. I feel that some ethical issues in the human service organizations is race. My dad lost

    asked by Anonymous
  38. english

    marian and joe had a big picnic what kind of word is picninc verb,noun,adjective Thank you for using the Jiskha Homework Help Forum. The word "picnic" is a NOUN, which names something.

    asked by renegade
  39. Religions of the World

    How has modern civilization impacted the spiritual lives of the indigenous people? Are indigenous religions still practiced today? If so, how have the practices changed over time? This is an extremely broad set of questions. There are indigenous peoples

    asked by Anonymous
  40. science

    Are there any related structure from an asprin? To show how important an asprin is from using a carboxylic acid. You need to clarify your question. I need to produce a related structure of the molecular features of carboxyli acid, size hydrocarbon group on

    asked by jake
  41. Religion

    Consider the interrelatedness of everything in the cosmos as it is expressed in many indigenous religions. How do you think the importance of these relationships developed? What spiritual purpose do you think they serve for indigenous peoples? We'll be

    asked by Anonymous