Questions Asked on
May 2, 2008

  1. math

    Factorise by splitting the middle term:- x^2-120xy-625y^2

  2. knight high

    how does optical mixing occur when using thin black line on white paper

  3. chemistry

    Write the reaction equation for calcium carbide producing ethanoic acid

  4. math-matrix equations

    I have a problem with the following homework question: Which product represents the solution to the system: -y + 7x=14 -x + 4y=1 a. | (1/27) (4/27)| | (7/27) (1/27)| b. | (-7/3) (4/3) | | (-1/3) (1/3) | c. | (7/3) (-4/3) | | (1/3) (-1/3) | d. | (-1/27)

  5. algebra

    Can I have a brief summary about Sierpinski's Triangle? Also, what is a conflict resoultion dealing with discrete math?

  6. chemistry steps check

    What is the pH of the solution created by combining 11.10 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? This is exactly like what Dr Bob has shown me on the first problem i put here and yet i get this simple one wrong... Here are my steps:

  7. english

    This is for Chrestomanci readers :-) I'm writing an essay on possibilities, and I remember that in Witch Week, there is a passage where Chrestomanci describes other worlds notably the one in which the French defeated the British, and what that world was

  8. physics - fluids

    A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm diameter hose delivering 450 L/min through a 0.80cm diameter nozzle?

  9. math

    If x=1/7+4√3 and y=1/7-4√3, then find the value of (i)x2+y2 (ii)x3+y3

  10. Chemistry

    a) Find the empirical formula for KxFey(C2O4)z·nH2O given % percents: potassium = 34.5% iron = 11.4% water = 11.0% oxalate = 43.1 % b) Insert values for x, y, z into KxFey(C2O4)z·nH2O then give correct coefficients to balance the equation:

  11. social studies

    How did the landscape of new england affect how and where people lived in the late 1700s and early 1800s?

  12. Geometry

    Which of the following scale factors would produce an expansion under a dilation of the original image? A. 2/3 B. -1/2 C. 3/2 D. -3/4

  13. World War One

    Hi there! Have any of you heard of the second battle of Villers-Bretonneux? I have and unfortunatly I need to know how many Australian Casualities there where. Can you guys help please Thanks Minnie PS> It was on 25th of April 1918

  14. Critical Thinking

    Capital Punishment Does Not Make Nation Safer Identify and name any rhetorical devices used by the author. If none exist, explain how you determined this. Until his death in 2003, Paul Simon was a professor at Southern Illinois University, where he taught

  15. psychology. please revise

    You are currently an associate at an advertising agency where you have worked for two years. You are pursuing a promotion to the position of advertising executive. While you have expected to put in extra hours and some added responsibility as part of

  16. Math Help PLEASE

    Write an equation of the line containing the givin point and parallel to the givin line. Express your answer in the form y=mx+b The equation of the line is y=? (-5,9);8x=7y+5

  17. Math/Fractions

    I really need help with this problem. I have NO IDEA how to get the answers to 3 and 5. Benjamin and Olivia are putting in a new floor in thier kitchen. To get the floor up to the desired height, they need to add 1 1/8 ft. of subfloor. They can do this in

  18. trig

    solve for x 6tanx - 4sinx = 1 i tried it but got a quartic formula :S 16sin^4x + 8sin^3x + 37sin^2x - 36 = 0

  19. chemistry

    What is the pH of the solution created by combining 11.50 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? What are the pH values for HCl and HC2H302 if you take into account that the 8.00 mL of 0.10 M

  20. please revise

    Oligarchy, dominated Latin America’s political structure from 1900 to 1939. At the height of the European industrialization, Latin America became Europe’s main provider for raw materials. Mexico, for instance, provided Europe and North America with

  21. Math

    i need to know exactly the formula of how to do these types of problems because i have spend seriously over an hour trying to do this one problem. HELP! A dealer mixes candy worth 90 cents per pound with candy worth 65 cents per pound in order to obtain 40

  22. please revise & critique

    Evidence clearly demonstrates Latin America’s political systems transition to democracy. Though unstable, it’s long democratic history reveals progression from oligarchy, to semi-democracy, to an electoral democracy. Thus, with these three cycles of

  23. marketing

    How can Acxiom reduce risk

  24. algebra

    what would the graph of interval (-4, 10) look like?

  25. math

    tan/1-cot +cot/1-tan =1+sec cosec

  26. Marketing

    What alternatives do Acxiom have?

  27. Latin

    The perfect system of the indicative active includes what tenses? perfect, imperfect and future perfect right!

  28. Latin

    The perfect active stem is formed in what way? I am clueless, but i think it is removing i from end of the third principal part

  29. Physics - Light & refraction

    I go this question in a test just today, but I know I got it wrong because I didn't study this section. It was something along the lines of this I'm pretty sure. "Explain why there is no critical angle when light travels from air to water" Can someone

  30. Economcis

    I have an assignment on the the factors which impact the Australian dollar. "How does the government influence the value of the Australian dollar?"

  31. business

    what is inflation?

  32. Geometry

    Two Right Triangles have equal acute angles, yet one triangle is larger than the other. Therefore, the triangles much be _________________. I've looked everywhere in my books and on the internet and I cant find it.

  33. Honors Geometry

    A cylindrical container weighs 36 ounces. Another container made out of the same material is similar to the first container with a height that is three-fourths the height of the first container. To the nearest tenth of an ounce, how much does the second

  34. statistics

    It is known that 60% of people do not respond to mailed questionnaires. In a sample of 20 questionnaires mailed, what is the probability that more than 12 people will respond?

  35. Statistics

    The head librarian claims that books have been checked out an average of seven times in the last year. You suspect she has exaggerated the checkout rate and that the mean number of checkouts per book per year is, in fact, less than seven. Using the

  36. chemistry

    Calculate the molarity of a solution in which 0.75 moles of a solute are dissolved in 125g of solution (density of solution = 1.05g/mL). I did this much: 1.05 * 1L/1000mL = 0.001 L I don't really know what to do.

  37. Business Calculus

    The function f(x)=4x+9x^-1 has one local minimum and one local maximum. Question: This function has a local minimum at x=______ with a value _______ and a local maximum at x=________ with value _______?

  38. chemistry

    Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. sorry i know this question has been posted already, but i need help. could you explain

  39. chemistry

    Given one of the starting materials and end product for the following reaction, show all reactants, reaction conditions in brackets (where known) and products. acetic acid from chloroethane

  40. Chem help!

    I need help for this question in combining gas law P1V1/T1=P2V2/T2. P1V1/T1=P2V2/T2 P1 is 1.5 atm V1 is a question mark. T1 is -20 °C K P2 is 2.6 atm V2 is 750 mL with a blank box underneath it. T2 is -5 °C K. How can I combine this question?

  41. Need help also with this chem ?

    I also thought this question on combining gas laws P1V1/T1=P2V2/T2 was also a bit tricky for me. P1V1/T1=P2V2/T2 P1 is 760 torr with a blank box underneath it. V1 is 2.4 L. T1 is 37 °C with a blank box underneath it. P2 is a ?. V2 is 4.8 L. T2 is 300 K.

  42. Reading Project

    I need someone who is a scientist to help me on my reading project. This basically is about how king penguins are being threatened by global warming. If your a scientist it would help me a lot. I just need to interview you and find more about King Penguins

  43. Chemistry

    What is the concentration of a solution prepared by diluting 25.0 mL of HCl 0.750 mol/L to a final volume of 500. mL?

  44. com 130

    Create a set of instructions explaining how to save a Microsoft® Word document on a computer running a Windows-based operating system to a computer disc.

  45. word scramble science

    what is this word-help scramble it- orocyran artery and lusenamir valve

  46. Check my answered questions.

    For the combining gas law P1V1/T1=P2V2/T2 home work assignment I did three answers on my own and would like you to check them if they are right. If for some reason the answers that I provided don't seem correct please provide me with the right answers.

  47. Food

    I have to prepare an Elizabethan food. Any recipes out there? I've been trying to find something other than meat.

  48. English Expression

    Birthday Present I have been with my boy friends for 2 years. His birthday is coming up May 13th and I have 3 ideas. He doesnt know I have been saving money, so he doesnt think I will be getting him anything. My ideas are: A new weed eater. We have an acre

  49. Computer Program

    What do I have to do if I want to make the sound volumes of many wmv files the same? Do you know any free programs for making all the video sounds the same?

  50. please review

    Evidence clearly demonstrates Latin America’s political systems transition to democracy. Though unstable, it’s long democratic history reveals progression from oligarchy, to semi-democracy, to an electoral democracy. Thus, with these three cycles of

  51. AED

    what are factors that define teaching as a professional career?

  52. Language Arts

    What is the adverb in this sentence? How are you?

  53. algebra

    I cannot come up with the correct answer for this problem. Please help 3.5+19.8>49.5-6.4x=

  54. chemistry

    Write the reaction equation for Isopropylbenzene producing Benzene P.S I don't mean to be overburdening you with the same kinds of questions its just that there is a quiz on this stuff on Monday and I want to be FULLY prepared LOL

  55. math

    Customers of a phone company can choose between two service plans for long distance calls. The first plan has a one time activation fee of $26 and charges 8 cents a minute. The second plan has no activation fee and charges 13 cents a minute. After how many

  56. Chemistry -- to Dr.Bob

    I posted this yesterday and tried to work it out today but i don't remember how to. You said convert to moles by multiplying for example .1M x .008L= 8x10^-4 ...after this what do i do with this number to find the pH i tried to just plug that into the

  57. AIDS in Africa

    What is the current state of AIDS in Africa?