Questions Asked on
August 8, 2007

  1. math

    I need to solve as an equation. A coffee merchant has coffee beans that sell for $9 per pound and $12 per pound. The two types are to be mixed to create 100 lb of a mixture that will sell for $11.25 per pound. How much of each type of been should be used

    asked by Lynn
  2. gaussian elimination

    4. Solve the following linear system using Gaussian elimination. Show work. 3x + y – z = -5 -4x + y = 6 6x – 2y + 3z = 2 how about looking at http://www.mathwords.com/g/gaussian_elimination.htm

    asked by linda
  3. cramers rule

    Solve the following linear system for x using Cramer’s rule. Show work. x + 2y – 3z = -22 2x – 6y + 8z = 74 -x – 2y + 4z = 29 Cramer’s rule uses determinants to find the solution Set up a 3by3 matrix using the coefficients of the x,y and z, and

    asked by linda
  4. Science

    A drop of ink is in a tube.A stopper is used.What will happen to the drop of ink in the tube when you place your hands around the flask for 5 minutes? Is water in the tube? And what's the stopper used for? If so, heat is transferred from the hand to the

    asked by Joey
  5. math

    Multiply. Use the lattice method. 277*32= I hope your teacher does not teach this method as a viable method for multiplication. A week ago Yahoo presented this method as a novelty and as a "math trick". This website explains and shows diagrams for

    asked by Haytheline Thomas
  6. check math

    Here are my answers. Can you check if I got the right answers? Thank you! (x-4)/(x^2-3x-4) = x+1 (x^3-8)/(x-2)=x^2+2x+4 (5-x)/(x^2-25)=-x-5 (x^2-4x-32)/(x^2-16)=(x-8)/(x-4) first one should be 1/(x+1) second is good third: -1/(x+5) 4th is ok Have you not

    asked by Anonymous
  7. check math

    Here are my answers. Can you check if I got the right answers? Thank you! Solve for z: 4x+10yx=0 z=-2x/5y y^2+3yz-8z-4x=0 z=(-y^2+4x)/(3y-8) there was no z in your first equation, from you answer I can tell it should have been 4x + 10yz = 0 If so, the

    asked by Anonymous
  8. Algebra II

    Write y=x^2+4x-1 in vertex form. y=x^2+4x-1 y=(x^2+4x+8)-1-8 y=(x+2)^2-9 This isnt one of my answer choices,what am I doing wrong? in second line: y=(x^2+4x +4 )-1 +4 (take one half of the middle coefficient, then square it) y=(x^2+4x + 4 )-1 - 4

    asked by Jonathan
  9. check math

    Here are my answers. Can you check if I got the right answers? Thank you! (x+3)(x-3)>0 answer: x3 x^2-2x-15

    asked by Anonymous
  10. Algebra

    The teacher wants us to do the following problem by using substitution. I don't think I am doing it right. 4x - 12y =5 -x + 3y = -1 Those two equations are for parallel lines that never intersect. There is no solution. If you substitute 3y +1 for x in the

    asked by Dori
  11. math

    Not sure about this... Need to solve by substitution 8x - 4y = 16 y = 2x -4 Substitute 2x -4 for y in the first equation and solve the resulting equation for x. 8x - 4(2x-4) = 16 16 = 16 The two equations are not independent. One can be derived fron the

    asked by Janna
  12. Chemistry

    Which forms the more alkaline solution and why? Al2O3; B2O3; CO2 or SiO2 Al2O3 and SiO2 are not water-soluble. CO2 forms the weak acid H2CO3, in water. What does that leave you with?

    asked by Vic
  13. FIN

    Brady Corporation is a leader in identification, safety, and material solutions. In 1998, the firm was hit hard by faltering foreign markets, so it embarked upon an aggressive campaign to redesign its cost structure. The firm believes this will help it to

    asked by HELP PLEASE!!!!!!!!!!!!!!!!!!
  14. Economics 205

    Hello, I need to choose an industry to study for my economics class. I'll have to write about wheter the industry is elastic or inelastic. Any suggestions? Do you consider politics as an industry? Or education? THose would both be good ones to check out.

    asked by Keisha
  15. chem

    What is the importance of an H-bond in water? It raises the boiling point of water; otherwise, following the sequence of H2Te, H2Se, H2S and H2O, the H2O would be a gas.

    asked by Big d
  16. check math

    Here are my answers. Can you check if I got the right answers? Thank you! solve for x, where x is a real number. x^2+3x-4=14 x=6,3 (x^4-1)/(x^3)=0 x=1 (x-5)^2=9 x=2,8 2x^2+5x=8 x= [-5+/-sqrt(89)]/4 for first one x=-6 or x=3, factors are (x+6)(x-3)

    asked by Anonymous
  17. construct a triangle

    How can I construct a triangle ABC with vertices A(-4,2), B(4,3), C(1,-3). what are the angles in order from least measure to greatest measure Since you will have to use trigonometry to find the angles, surely you must know how to plot points. take the

    asked by Sam
  18. math

    Solve systems by substitution 5x - 2y = -5 y - 5x = 3 Substitute 5x + 3 for y in the first equation, and solve it for x. Once you have x, use either of the two equations you wrote to solve for y.

    asked by Robin
  19. WRITING

    How Do you vaule reading in you life? I suppose to get someone else opinion. What is the view on whether writing skills are influenced by reading habits? I love to read. Of course, I get to pick and choose what I read, and mostly I read the news, blogs,

    asked by LATUNJA JONES
  20. Biology

    What are the levels of organization in a living system? LEVEL 1 - Cells Are the basic unit of structure and function in living things. May serve a specific function within the organism Examples- blood cells, nerve cells, bone cells, etc. LEVEL 2 - Tissues

    asked by jayjay
  21. English

    In Of Mice and Men, Curly is said to have one been welterweight boxer/ a semiprofessional boxer. I reread the book, but I can't find that info. anywhere. Can you please point it out to me? Here are several sites that refer to this:

    asked by Anonymous
  22. English

    When I am handwriting the names of books and plays, do I underline them or put them in quotes? These are the works that I am writing: Tortilla Flat, The Grapes of Wrath, The Pearl. In handwriting, book titles will need to be underlined. Since all of these

    asked by Anonymous
  23. math

    how do you convert the fraction 2/3 to a decimal Multiply numerator and denominator by 3: 2/3 = 6/9 1/9 = 1/(10-1) = 1/10 * 1/(1-1/10) = 1/10 [1 + 1/10 + 1/100 + 1/1000 + ...]= 0.1111111111111 Therefore 6/9 = 0.6666666666666666.... Another way to convert

    asked by joy
  24. English

    Their Eyes Were Wtaching God By:Nora Zeal Hurston. "to be a pear tree - any tree in bloom!" (11). The image suggests a wholeness - as bees pollinate blossoms paralleling human sexual intercourse. What does that mean? What is another way to say that? Bees

    asked by Margie :D
  25. Weird question

    Why is the line of the inequality solid when = and dotted when < or >? It is a representation. If (ie, dotted means values on either side of the dotted line are allowed.)

    asked by Shawn
  26. Algebra II

    Solve x^2+2x=-2 by graphing and indicate the roots.Please and thank you We can't draw graphs for you here. The roots are x = -2.73 and -0.73 I suggest you make your own graph of y = x^2 + 2x and see where it crosses the horizontal line y = -2. Choose x

    asked by Jonathan
  27. Fin

    Brady Corporation is a leader in identification, safety, and material solutions. In 1998, the firm was hit hard by faltering foreign markets, so it embarked upon an aggressive campaign to redesign its cost structure. The firm believes this will help it to

    asked by HELP PLEASE!!!!!!!!!!!!!!!!!!
  28. Managerial Economics

    The MorTex Company assembles garments entirely by hand even though a textile machine exists which can assemble garments faster than a human can. Workers cost $50 per day, and each additional laborer can produce 200 more units per day (the same for each

    asked by Christina
  29. Accounting

    I need to do a report and compare ratios for a target company against industry averages. I have calculated the averages for my company, but where do I get information on industry averages? For example, what is the industry average receivable turnover ratio

    asked by AccountingStudent
  30. Business presentation

    Imagine you have been asked to make FOUR presentations on "Effective Presentation Skills" for FOUR very different audiences. What would be your presentation objective for each group? Write a 1-sentence objective statement (also known as "purpose

    asked by Bridgett
  31. English

    In A Raisin in the Sun, is the main conflict poverty? http://www.sparknotes.com/lit/raisin/summary.html Look for the word "clash" or "disagree" or something like that. =)

    asked by Anonymous
  32. English

    Could someone please check my answers? 1. Who is right about Willy Harris? Mama 2. Does Beneatha like her nickname Alaiyo? yes 3. Does it fit her? yes But why does it fit her? What does Alaiyo mean? It is said in the play... When you read that, you will

    asked by Anonymous
  33. legal and ethical issues

    Which element do you think plays the greatest role in influencing employee behavior? Explicit policy or implicit policy. First find out what explicit and implicit mean. Then think about a couple of job situations. Pretend you are the employer, then the

    asked by Anonymous
  34. check math

    Here are my answers. Can you check if I got the right answers? Thank you! 1/(x+h) - 1/x= -h/(x^2+xh) (2/x^2)/(10/x^5)= (x^3)/5 [1/(3+x) - 1/3]/x= -1/(9+3x) 2x/(x^2-6x+9) - 1/(x+1)- 8/(x^2-2x-3)= (x^2+15)/(x^3-5x^2+3x+9) first 3 look ok In the last one I

    asked by Anonymous
  35. check math

    Here are my answers. Can you check if I got the right answers? Thank you! (x+y)^3= x^3+3x^2y+3xy^2+y^3 [x^(3/2)][x+x^(5/2)-x^2] = x^(5/2)+x^4-x^(3/2) the last term in the second question should be - x^(7/2), (you were adding 5/2 and 2 in the exponents)

    asked by Anonymous
  36. Science(chem)

    In lab...last one ...where I had to go and heat these brass cartileges (I really don't think that's spelled correctly) and the oven was off. So my substitute lab tech for the day went and ...created a oven...yep you hear me right created a oven of

    asked by ~christina~
  37. WRITING

    have your writing habits been affected by the quality and quantity of what you may read? Yes. My writing habits have definitely been influenced by what I read. The major way we learn to write is by reading. We unconsciously emulate authors of published

    asked by LATUNJA JONES
  38. Algebra II

    Solve x^2>_2x+24 x^2-2x-24>=0 (x-6)(x+4)>=0 So as long as x>6, it works. But what about two negatives? Try x=-5..checks...check me on that. So it looks as if -inf

    asked by Jonathan
  39. Science

    Relative abundance of weight? If a hawk eats a fish and does not acquire all the energy in the fish's body because of the second law of thermodynamics then what implications would have a relative abundance by weight of predators and their prey? I

    asked by Rindi