1. Linear Algebra

    Hello ! i try to solve Linear algebra 2 questions(but need them be written properly as mathmatical proofs) Having A matrice nXn: 1)proove that if A^2=0 the columns of matrice A are vectors in solution space of the system Ax=0 (x and 0 are vectors of
  2. Calc 2

    Ok, I have two questions first: 1. I'm asked to find a cartesian equation for the polar graph of this polar equation: r^2 = sin(2(theta)) The answer I got was (x^2+y^2)^2/(2xy) = 2 Is this the correct way to express it? 2. I need to find the cartesian
  3. English

    I know I'm asking a lot of questions about plagiarism but I'm nervous lol. If I diagram two sentences and they don't look the same I might be free from plagiarism right? Like the two sentences I asked about earlier. From the source Parents often want to
  4. Grammar

    The last four grammar questions of the day [I think]- idenify the word that the phrase in CAPS modifies: 1.A scientist WHO FINDS ONE NEW SPECIES is very happy Ans- scientist 2.WHEN SOMEONE FINDS SEVERAL NEW SPECIES AT ONCE, that is rare indeed Ans- rare??
  5. Chem Help please!!!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions:
  6. History

    1. Why do some argue that the Supreme Court "legislates from the bench" or, in other words, actually makes law? A. The Supreme Court does not legislate, i.e. make law. B. The Supreme Court is involved in administrative law. C. The Supreme Court's rulings
  7. calculus

    I need help understanding how the series of e derives into the exponential series using the binomial theorem. Here is a link to a pic of a page in my book, regarding the exponential series: ht tp://i46.tiny pic(.)(com)/qz0oat . jpg (remove parentheses and
  8. chemistry

    Run # Volume NaOH used (mL) 1 4.1 2 4.3 3 2.8 Concentraion of NaOH: 0.113 M pH of acid: 2.84 the questions are: #moles of NaOH: ? initial acid concentration: ? Determine the Ka and pka of the weak acid: ? So here is what I did: Shaked for several minutes
  9. math (final trig problem)

    Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig
  10. writing

    In this discussion, you will post issues related to motivation and learning. Refer to the texts in this section, other texts you have read, and your personal experience and knowledge to support your ideas. Begin your discussion by addressing the following
  11. Social Studies

    I need help understanding Federalist #46. I have to do a brief summary of it? One of the major controversies about the Constitution was the power given to individual states versus power of the federal government. Federalist Paper # 46 stresses that the
  12. Economics 101

    Hey guys my Econ final is on Tuesday and I could use some help. These are 4 example questions true/false with explanation needed. 1. A monopolist will produce less and charge a higher price than a perfectly competitive industry. 2. Regardless of the type
  13. statistics

    The latest in the "You may be a redneck if . . . " genre has produced a simple questionnaire. If more than 80% of the questions are answered in accordance with redneck"philosophy" (e.g., "You may be a redneck if grade 4 was the best 5 years of your life")
  14. Social Studies

    Ok, so in many ways the relation between China and Japan reflect what we've already seen between Russia and Byzantium. What were the most important things that Japan borrowed from China? Chinese influence in Japan reached its height during the time of
  15. english/biology

    I was wondering if you can check to see if these are good predications, hypothesis and questions. Like does the grammar makes and stuff. Thank you Hypothesis : Temperature as one, environmental factor will affect the physiological functioning of the small
  16. physics questions

    can you please check my answers? 1.what would be the path of the moon if somehow all gravitational foces on it vanished to zero? -would the path of the moon be arched. 6. is the force of gravity stronger on a crumpled piece of paper than on a indentical
  17. English Expressions

    1. What are the strong points of TV? It gives use pleasure, and it gives us information. 2. What is a strong point of TV? We can learn a lot watching TV. 3. What do you think is the strong point of TV? We can know latest news from TV. 4. What are strong
  18. Algebra 1

    A parking garage has floors above and below ground level. For a scavenger hunt, galas friends are given a list of objects they need to find on the third floor and fourth level below ground, the first and fourth above ground, and ground level. Question A .
  19. history

    I need to interview someone who was born before 1970 and live in the United States during the eighties. Here are some questions. Who were some of the national heroes of the 80s? What do you remember about the Iran-Contra Affair? Please comment on the
  20. ELECTROLYSIS OF ZnI2

    ELECTROLYSIS OF ZnI2 if you have done this experiment Please help me answer these questions as i missed the last half of my chem lab today. 1. What color change occurred when the wire is first heated. -next question is... What is the identity of the
  21. Chem- REALLY URGENT!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions:
  22. Physics

    This time I have two questions: #1.A recording engineer works in a soundproofed room that is 49.7 dB quieter than the outside. If the sound intensity in the room is 2.66 x 10-10 W/m2, what is the intensity outside? #2.A listener increases his distance from
  23. English

    Ponder about the parrot which shakes its head and sings when you walk through the door, bending its neck for the cozy touch of your fingers. Ponder about the cat that bends its back and moves on your shins as it makes a "meow" for dinner, and then gets
  24. English

    These questions are from the article I posted about the woodpeckers. How would you describe the tone of the last section of the article? A. optimistic B. cautionary C. regretful D. elated B Which of the following sentences is an example of a hyperbole? A.
  25. English

    What are you good at? I am good at driving my car. Why are you a good student? Because I listen to the lectures of teachers at class. Why are you a good daughter? Because I help Mother wash clothes with a washing machine. Why are you a good son? Because I
  26. Math

    I posted these 2 questions a couple of days ago and although the help I received would have been more appreciated if it didn't come with an underhanded comment, I did see where I made my mistake with the first question, however I would like to know with
  27. math

    a mathematics question contained 20 items. every wrong answer scores -2marks, every correct answer scores 4marks and no mark for no answer. (a) find the minimum possible score (b) Tembo had 10 correct answers, 8 wrong answers and 2 no answers. What was his
  28. English

    A question on my college survey says “What are your concerns or worries about starting or continuing college, such as subject areas you need to improve, study skills, or other issues that may make it difficult for you to finish?” What should my answer
  29. Chemistry

    (I need help with these two questions. I don’t know how to solve it.) 1. A student takes 215mL of a 5.0M HCI solution and places it into a beaker. The students then adds enough water to the beaker to make 750mL. Calculator molarity of this new solution.
  30. Chemistry (chromatography)

    I had a chromatography experiment for chemistry and here is one of the questions: Did the compounds travel farther in the water or the isopropyl alcohol (rubbing alcohol)? Explain why you think that this is the case. Now, the compounds traveled the
  31. Organic Chemistry

    Hello, I have done an experiment in Organic Chemistry called :SN1 Reaction: Synthesis of t-amyl chloride from t-amyl alcohol, there are some questions that I am unsure about, 1) What are the 2 rules of HCl in this reaction? Can you use NaCl instead of HCl
  32. English

    Thank you very much for your corrections. I still have a few questions on my previous post. 1. I'm as fast as a lightning. I'm fast like lightning. I'm fast like a lightning. (?) I'm lightning fast. 2.The personification is usually made (recognizable?)
  33. BUSINESS CONSULTING

    C10; Introduction to Computers Assignment 8; Business Consulting Remember Bill? He was the gentleman that you helped to start up his business in week 4. Well his business is doing well, but he has come to you with some questions and concerns. You discuss
  34. Science

    1.)TRUE OR FALSE: Scientific investigations involve testable questions. * True False 2.)Which of the following would not be a reliable place to find research for a scientific investigation? * science journals experts wikipedia textbooks 3.)Why should a
  35. Chemistry, PPPLLEASE Help!

    Hello, I'm confused on what these problems are telling me. Is questions a) and b) the same? I don't know, please help me I don't know what to do... The inteconversion of DHAP and G3P is a part of both the glycotic pathway and the Calvin cycle for
  36. Science 5

    What are the characteristics of globular cluster stars? A.no stars as hot as our Sun B.old age and hundreds of thousands to millions of member stars C.no main sequence stars left, with billions of member stars D.a few hundred stars, most still on the main
  37. Reading

    The Great Gatsby Movie Discussion Questions? Compare and contrast Gatsby's social class with that of Tom and Daisy Buchanan. How does geography contribute to the definintion of social class in The Great Gatsby? What part of his past is Gatsby trying to
  38. Spelling

    I have tried so many ways to do these questions, but I cannot figure it out. Word Bank crunch thoughtful batch theater cloth harsh birch scratch whittle switch 1. My aunt likes to ____________ small figures from the trees branches. 2. The _____________
  39. Random Question

    Posted by Alex on Saturday, June 4, 2011 at 12:55pm. Based on readings from the first 20 chapters of "Invisible Man", what does the narrator mean when he refers to himself as "invisible"? Is it because of all the situations he been in and no one really
  40. anthropology

    Why do kinship systems work? Where, if any, would you find a working kinship system within the United States? Give examples for both questions. This is my answer, am I right? Most of us are in a kinship system with spouses, children, parents, grandparents,
  41. math am i correct

    In 2002 there were more than 30,000 McDonald’s restaurants in the world. Of these, approximately 14,000 were in the United States. In Great Britain there were 1,116 McDonald’s franchises. The following data are taken from those 1,116 McDonald’s.
  42. Chemistry/ Dr.Bob222

    DrBob222 I am beginning to understand about balancing equations well, thanks to your help, but there are still some other things, which I am having a hard time figuring out. Complete and balance the following chemical reactions between an acid and a metal.
  43. Math/algebra

    Post a New QuestionCurrent Questions Homework Help: Algebra Posted by Kristen on Tuesday, May 5, 2015 at 7:53pm. A bank teller counts her $10 and $5 bills at the end of the day. She has a total of 70 bills. The total value of the money is $595. Let f
  44. chemistry

    thanks Can someone please help me with these questions please? 1) How is evaporation different than boiling? 2) What advantage is there to using hot water to make ice cubes? 1) http://www.pkwy.k12.mo.us/west/teachers/anderson/pack7/boil/boil.html
  45. Personal Finance

    I have two questions. 1. Describe at least two non-discretionary expenses that you expect to have at some point in your life. 2. Describe at least two discretionary expenses that you expect to have at some point in your life. help please
  46. English

    1. What's your opinion of my painting? 2. What's your opinion about my painting? 3. What do you think of my painting? 4. What do you think about my painting? 5. How do you feel about my painting? 6. How do you feel of my painting? 7. What do you feel about
  47. MATHS

    I have three questions: 1. What is the remainder when 27 to the power of 1001 is divided by 13? 2. What is the remainder of when 38 to the power of 101 is divided by 13? 3. How do you show that 70 x 27 (to the power of 1001) + 31 x 38(to the power of 101)
  48. 4-- math questions

    1. Simplify this expression: 6d + 11 – 3d + 4. 3d 17d + 7d 3d + 15 9d + 15 2. Name the coefficients in this expression: 7a + 3b + 9. 7 and 3 7, 3, and 9 7a and 3b 7a, 3b, and 9 3. Name the like terms in this expression: 4c + 12 + 3c + 2b. 4c, 3c, and 2b
  49. Math

    I'm confused on two questions that are kind of similiar: State the slope and y-intercept of y= -1/2x I know the slope is -1/2 but I don't know the y-intercept State the slope and y-intercept of y= 3x-4 I know the slope is 3, but I don't know if the
  50. microeconomics - ("economyst" i need your help)

    hey thanks for previous replys to earlier questions...espicially "economyst", you have been a great help !!! stuck on these questions, so if anyone can help plz do !! Q:state whether the folloing statements are true or false and EXPLAIN clearly the reasons
  51. Writing equation of a polynomial function

    Can you help me with the following questions, I don't understand. thanks! Write the equation of a polynomial function with the given characteristics. Use a leading coefficient of 1 or -1 and make the degree of the function as small as possible. #1. Crosses
  52. Math

    I'm trying to help my nephew with some homework and am hopeless. Please help with these questions: If 180 calories of heat were added to 50 grams of copper, what would the change in temperature be? (specific heat of copper = .09) What would the temperature
  53. physics

    What can we conclude from the attractive nature of the force between a positively charged rod and an object? 1. The object has no net charge. 2. Cannot be determined. 3. The object does not have an appreciable negative charge. 4. The object does not have
  54. English check my answers

    For the following questions, identify the correct form of irregular verbs in the sentences. Choose from the word box below. A. past B. present participle C. past participle 47. Claude is getting a new computer for his birthday this year. (1 point) A B****
  55. American Government

    I really need help on this journal activity. In this assignment, you are to take each of the purposes form a more perfect union, establish justice, insure domestic tranquility, provide for the common defense, promote the general welfare, and secure the
  56. math

    I'm tring to get an answer to the questions that was asked on the previous page: the volume of Fort Peck Dam is 96,050 X 1,000 m3. Suppose the state of Montana decides to increase the volume of te dam. After the improvements, Fort Peck will hold 10 times
  57. Economics

    After the U.S. invasion of Iraq, the price of jet fuel used by airlines increased dramatically. As the CEO of Air Canada, you have been presented with the following options. Evaluate these options in the context of decision making model. a) raise airfares
  58. Art

    Writeacher, could you please check these questions? Thank you. I need to express question number 3 in a different way. 1)Briefly analyze the works of at least two authors (also: of those authors?) (we dealt with in class) who showed a deep social
  59. Algebra

    I have 2 questions in math that I am not quite sure about... 1. Mandy begins bicycling west at 30 mph at 11 A.M. If Liz leaves from the same point 20 min. later bicycling west at 36 miles per hour, when will she catch Mandy? 2. A mixture of 10% acid and
  60. Math

    Karen wants to collect data about the hobbies of her friends. The table shows a list of some questions she might ask. Is each question a statistical question that Karen can ask to collect data? Select Yes or No for each question. Question Yes No How much
  61. Chem

    The mass of a beaker is 5.333g. After 5.00 mL of a concentrated hydrochloric acid solution is pipetted into the beaker, the combined mass of the beaker and the hydrochloric acid sample is 11.229 g. From the data, what is the measured density of the
  62. Algebra

    I have 2 questions in math that I am not quite sure about... 1. Mandy begins bicycling west at 30 mph at 11 A.M. If Liz leaves from the same point 20 min. later bicycling west at 36 miles per hour, when will she catch Mandy? 2. A mixture of 10% acid and
  63. math --- can someone help me pls?

    can anyone help me with these 2 questions pls? Calculate the slant height for the given cone. Round to the nearest tenth. (1 point) Diameter = 8 Height = 9 10.2 cm 11.4 cm 9.8 cm 12.0 cm Calculate the length of the diagonal for the given rectangular prism.
  64. Chemistry

    3Cu+8HNO3--> 3Cu(NO3)2+ 2NO+4H2O How many moles of HNO3 are required to react with 6 moles of Cu? How many moles of Cu(NO3)2 are produced when 3 moles of Cu react? How many moles of Cu must react to produce 4 moles of NO? If 4 moles of NO are produced,
  65. psychology

    A school psychologist is asked to help with a third grade student who is disrupting the class and causing the teacher to consider a change in professions. The psychologist interviews the parents, teachers, students, and student. She examines the reports of
  66. Math Ms. Sue

    Here are the questions I need help with, please help. [(1/4)^-3 divide sign (1/4)^2]^-2 I got (1/4)^10 but I got it wrong (3^1/2)^3 _______ I got 1/216 9 (-56r^2)divide sign (-7r^2)= I got 8r x(y)(x)(2y) (12) (10xy^3) (3x^2y^2) (5x) (2y) simplify sqaure
  67. Math Please Urgent

    Here are the questions I need help with, please help. [(1/4)^-3 divide sign (1/4)^2]^-2 I got (1/4)^10 but I got it wrong (3^1/2)^3 _______ I got 1/216 9 (-56r^2)divide sign (-7r^2)= I got 8r x(y)(x)(2y) (12) (10xy^3) (3x^2y^2) (5x) (2y) simplify sqaure
  68. chemistry

    hello, I have done a acid & base titration lab, with 0.1M vinegar (with unknown %tage acid) and 0.1 NaOH...I think the result came out ok, in avg, 25.21mL of NaOH have titrated w/ 30.0mL unknown %tage acid of vinegar. all I am given is Density of vinegar=
  69. 6th grade math

    My son has this homework and I am all confused... the paper says to think back to the experiment you just designed to test the Best Wheels Bike Shop's new super titanium wheel bearings. He did not do this experiment which leads me to believe this is just a
  70. Chemistry ASAP

    3. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions:
  71. Grade 10 Physics (Acceleration, Speed, Time)

    I just need someone to check my answers to this one review question.. Exams are tomorow so i need them to be checked quickly. An Octopus accelerates at a rate of 0.65m/s/s for a time of 4.8s. How much will the speed of the octopus change? We are trying to
  72. physics

    soo for physics, we did a lab where we launched a cart on a track on the floor and recorded time, distance, etc. to figure out things. one of the questions on the lab is: can you think of a simple follow-up experiment that would allow you to determine how
  73. Sociology/Social Responsibility

    How can I connect the three "Classical Theories of Morality" to my own cultural identity? How will they align or not align with my cultural identity? How does cultural identity impact social responsibility. The Three classical theories of Morality are
  74. Anatomy & Physiology

    I have 3 questions. What part of the ear transmits vibrations to the hair cells of the Organ of Corti? What is the fluid that takes the vibrations out of theear and out of the round window? Which of these statements would NOT be true? 1. the stapes
  75. History, Africa and AIDS

    Okay so i have a few questions, because I have a report to do I'm just not very good with writing out what i'm thinking. Africa and AIDS/HIV 1.) How does this issue affect the well-being of the people that live within the region? 2.) How have leaders of
  76. Seminar MGT

    Is there a way to test the global business citizenship status of any company? What metrics would you use to do so? First, I'd define "global business citizenship" status. Do you mean how much money it makes? Do you mean how it treats and recompenses its
  77. chemistry

    In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after
  78. Biology

    Having a really hard time following this diagram of the Kreb cycle and I need to answer these questions: 1. Total number of NADH molecules produced for each glucose molecule in the Krebs cycle. A)2 B)4 C)6 D)8 E)10 2. The theoretical yield of ATP from each
  79. chemistry

    Use the equation below to answer the questions that follow. Br2 + Cl 2 ⎯→ 2BrCl a. How many moles of BrCl form when 2.74 mol Cl2 react with excess Br2? b. How many grams of BrCl form when 239.7 g Cl2 react with excess Br2? c. How many grams of
  80. chemistry Thank a lot help

    100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. 50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solution are mixed. Molarity of cl ions in the
  81. chemistry help

    In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after
  82. SraJMcGin

    SraJMcGin. I have a few questions; a few things that I don't really get.. I have trouble remembering the endings of the er, ir, and re verbs. Regular verbs mean that they don't have to be changed(they stay in the same form), its just their endings that
  83. Math

    Here are the questions I need help with, please help. [(1/4)^-3 divide sign (1/4)^2]^-2 I got (1/4)^10 but I got it wrong (3^1/2)^3 _______ I got 1/216 9 (-56r^2)divide sign (-7r^2)= I got 8r x(y)(x)(2y) (12) (10xy^3) (3x^2y^2) (5x) (2y) simplify sqaure
  84. Geography

    While looking at a political map of Western Europe, answer these questions: 31. What does a solid black line on the map signify? National Boundary 32. Which nations of Western Europe border on the Mediterranean Sea? need help! 33. List the nations that
  85. social studies

    I have completed my education but can't find a job. How can I organize politically to change this situation within the norms of Canadian politics? Work to get your Native population better conditions. Always a needfull situation. What kind of job are you
  86. Chemistry

    Hey guys so I was absent for my class and my teacher STILL wants me to figure out how to do limiting reactant and theoretical yield I tried Khan academy and it was no use. So basically the first question is : My data is : Mass of lead nitrate = 5.03g and
  87. phenolphthalein

    sorry, I miss your reply to this answer. I suspect that it was deleted when we transfered to the new server as I notice that every posts before the switch were deleted. It may have been eliminated. Do you want me to do it again. If so, let me know exactly
  88. Chemistry

    1. How would using 0.42 g CH3CO2Na * 3H2O instead of the amount called for in the procedure change the theoretical yield of Fe(C5H7O2)3 = 3.53g. 2. When a student sees crystals form after she added a few drops of water to the filtrate. Need chemical
  89. urgent!!!words questions dued tomorrow

    Each phase is an anagram of a country and it's capital city. 1.CHEESE GARNET 2.OSSARIUM COWS 3.RARE NAUTICAL ARABS 4.SAVE UNITARIAN 5.ROYAL ITEM If don't know all still tell me what you know.HURRYHURRYHURRY... The first and last are in southern Europe,
  90. Pre-Cal: Domain

    [Note: I really need help on these Domain questions. I've been struggling with this all day] -Consider the following: f(x)= 5/x , g(x)= 7/(x+7) -Find the solutions to the following: 1). (f+g)(x) 2). Domain of (f+g)(x) [Use interval notation too] 3).
  91. spanish 3

    I need some help with these true or false questions: 1. ¿Esta oración utiliza los pronombres correctamente?: Jaime da un regalo a su hermano. Jaime dáselo. TRUE** 2. ¿Esta oración untiliza los pronombres correctamente?: Yo compro un disco para ti. Yo
  92. Chemistry

    Calculate the theoretical yield in moles of Fe(C5H7O2)3 for this experiment. Record this number on your data sheet. Calculate the theoretical yield in g Fe(C5H7O2)3 (GMM: 353.18g mol^-1), for this experiment. Record this number on your data sheet. I really
  93. chemistry

    Calculate the theoretical yield in moles of Fe(C5H7O2)3 for this experiment. Record this number on your data sheet. Calculate the theoretical yield in g Fe(C5H7O2)3 (GMM: 353.18g mol^-1), for this experiment. Record this number on your data sheet. I really
  94. teaching as a professional career

    In a 200- to 300-word response, you must identify 3-5 factors that define teaching as a professional career, and elaborate on how teachers employ these factors on a daily basis. Your responses might include the following: teaching requires professional
  95. Algebra multiple choice!

    I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give
  96. Physics

    2 Questions. 1. If you wished to produce a sound with a wavelenght in air equal to the length of the room, 10m, what would be its frequency? 2.You note a 4.0 second delay for an echo in a canyon. What is the distance to the wall of the canyon? 1. Use the
  97. science

    I posted this under science because I see it occurring most under this subject. Many of the tutors here are very rude and useless at times. Honestly, if kids are on the internet seeking help for questions on their homework or whatever, they aren't going to
  98. To Alice

    Please don't piggy-back your questions on other students' posts or replies. That's how things get lost. You posted this: I am having a problem with my assignment, I am currently attending Peen Froster for Medical billing and Coding. The subject is about
  99. Math

    I need help with these three math question. 1st question. What is the additive inverse of 5 on the 12-hour clock? 2nd question. What is the equivalent number on the 12-hour clock. -22 the choices for this question is, 5 or 2 or 3 or 1. 3rd question. I need
  100. Comprehension (poetry)

    There were much more questions than this but these 2 are the main ones. Thank you for helping! Down came the storm, and struck hard The vessel in its strength; She shuddered and paused, like a frightened steed, Then leaped her cable's length. "O father! I