1. Chemistry

    Write half-reactions for the oxidation and reduction processes for the following: Sn2+ + IO3- -> Sn4+ + I- (acidic solution) MN2+ + H2O2 -> MnO2 + H2O (basic solution)

    asked by Mary on May 26, 2010
  2. chemistry help plzzz

    how can i calculate the pH of the solution obtained when 50.00mL of 0.150mol/L hydrochloric acid is added to 75mL of a 0.111 mol/L aqueous sodium hydroxide solution. need help i am stuck with that question thank you :)

    asked by tarkan on December 24, 2010
  3. Biochem

    You prepare a 1L solution of 0.5 M imidazole. (pKa= 7.05). Calculate the pH of the solution after you add 0.1 moles of HCl. I need to create an ICE table. I also know I need to use the Henderson- Hasselbalch equation but I'm confused on what to plug in.

    asked by Ashley on September 23, 2016
  4. Chemistry

    A solution is prepared by dissolving 35g hoemoglobin in water to make 1 litter. If osmotic pressure of solution is 10.00mmHg at 25 degree centigrade. Calculate the molarmass of the hoem6globin

    asked by Shuhudaht on June 11, 2015
  5. Chemistry

    A 0.05 N solution of a salt occupying a volume between two platinum electrodes seprated by a distance of 1.72 cm an having an area of 4.5 cm2 has a resistance of 250 ohm. calculate equivalent conductance of a solution

    asked by Robin Singh Hayer on June 8, 2012
  6. Chemistry AP

    What are the concentrations of benzoic acid and sodium benzoate in a solution that is buffered with a pH of 4.55 and has a freezing point of -2.0 degrees Celsius? (assume complete dissociation and a density of 1.01g/mL for the solution.)

    asked by Cj on February 5, 2014
  7. chemistry

    calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

    asked by Randy on April 29, 2012
  8. Chemistry

    0.0158L of 0.25M HCL is needed to nutralize 22.0ml of a potassium hydroxide solution. Write the neutralization reaction then calculate the molar concentration of the KOH solution?

    asked by Donna on September 6, 2012
  9. chemistry

    calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

    asked by Randy on April 29, 2012
  10. Chemistry

    A solution of AuCl- is mixed with a solution of Sn2+ under standard conditions. What is the equation? the answer is 2AuCl4- + 3Sn2+ -> 3Sn4+ + 2Au + 8Cl- how do i get this? ITS desperate... plz help me! THANK_YOU SO MUCH!

    asked by Chemistry on June 14, 2012
  11. Chemistry

    Chemistry - Danielle , Wednesday, February 11, 2009 at 7:24pm The density of a 22.0% by mass ethylene glycol (C2H6O2) solution in water is 1.03 g/mL. Find the molarity of the solution. Answer in M

    asked by Danielle on February 11, 2009
  12. Chemistry

    a solution is prepared by dissolving 50 g of calcium chloride in a 250ml volumetric flask which is then filled with distilled water up to the line-mark. Calculate the molar concentration of the solution.

    asked by Huda on April 5, 2014
  13. Chemistry

    Calculate the mass in g of aniline (C6H5NH2, Kb = 4.3 x 10-10) that must be added to 1.4 x 102 mL of 0.24 M (C6H5NH3)Cl solution in order to generate a buffer solution of pH 5.56. Give your answer to 2 significant figures. Noclue...

    asked by Andrew on November 24, 2007
  14. chemistry

    A chemist must dilute 55.5mL of 2.80 M aqueous nickel(II) chloride NiCl2 solution until the concentration falls to 2.00 M . He'll do this by adding distilled water to the solution until it reaches a certain final volume.

    asked by jil on May 5, 2017
  15. physics

    A particle B of mass 10g is shot vertically upward from a point O with velocity 10m/s. The horizontal plane containing O is the reference level of the gravitational potential energy .Neglect all air effects. a) Calculate the mechanical energy of the system

    asked by angy on September 19, 2016
  16. Health

    The three lines of defense your body has against disease include all except? A. physical and chemical defenses B. inflammation C. immune system D. scarring True or false B cells and H cells are two important cells in the immune system that help fight

    asked by Annabelle on November 17, 2015
  17. physics

    A particle B of mass 10g is shot vertically upward from a point O with velocity 10m/s. The horizontal plane containing O is the reference level of the gravitational potential energy .Neglect all air effects. a) Calculate the mechanical energy of the system

    asked by angie on September 19, 2016
  18. fine art

    Examine the "Winged Genie Fertilizing a Date Tree." Explain the elements of art found in this work. Is there one element in particular that contributes to the overall success of this design. Explain what type of movement is shown in this work. I got the

    asked by student on August 23, 2017
  19. Social Studies

    Which statement explains why division of labor increases work productivity? 1. Employers can pay workers more money when they get more done. 2. Employers must fire some of their workers so fewer people have to get the work done. 3. Workers learn their jobs

    asked by Anonymous on September 12, 2013
  20. Solving Equations with Rational Expressions

    Can someone please show me how to solve these for me? 5/(y-2)=y+2 (x/3)-(2/3)=(1/y-5) (y+2)/7=1(y-5) (x^2)/(x-4)-7/(x-4)=0 x^2/(x+3)-5/(x+3)=0 I assume that your second equation has y as a typo. I will use that as an example. (x/3)-(2/3)=(1/x-5) Multiply

    asked by Mike on May 29, 2007
  21. epidemiology

    Let’s say you are a health policy expert and you are sitting in your office and you receive a phone call from a news reporter. The reporter asks you to comment for a story she is writing. She has learned from the chief of neurosurgery at Cooper

    asked by sara on April 5, 2013
  22. Precal.

    If object is thrown upward with an intitial velocity of 15 ft per second, then its height is given by h=-15t^2 + 60t. What is the maximum height? Two ways to find it. 1) AT the top, max height, will be one half of the time it would come back down and hit

    asked by trellis on June 5, 2007
  23. Intermediate Accounting

    Total contract price $100,000 Actual costs during 2006 20,000 Estimated remaining costs 40,000 Billed to customer during 2006 30,000 Received from customer during 2006 10,000 16. Under the completed contract method, how much should Hickam recognize as

    asked by cyndi on December 11, 2010
  24. math

    A school sells tickets for a show, (a) adult tickets and (c) child tickets. 1) each adult ticket costs $8 and each child ticket costs $5. the total takings are 2300. Write an equation to represent this information. 2) solve algebraically the simultaneous

    asked by harry on January 1, 2010
  25. strategic ffinancial mangement

    XYZ company is contemplating the purchase of a new machinery costing rupees 30000with an expected life of 5 year at the end of which period , it can be solved for rupees 750 thousand in replacement of an old machine purchased 3 years ago for rupees 15000

    asked by shruti sieth on March 10, 2013
  26. Government

    I think it is ( a ) or ( c ) but not sure What makes precedent important in our justice system? a) It is the current interpretation of the law. b) The US justice system does not use precedent. c) It provides a historical background but is not relevant in

    asked by Adam on December 1, 2015
  27. Government

    I think it is ( a ) or ( c ) but not sure What makes precedent important in our justice system? a) It is the current interpretation of the law. b) The US justice system does not use precedent. c) It provides a historical background but is not relevant in

    asked by Adam on December 1, 2015
  28. Business Statistics

    John & Jane are married. The probability that John watches a certain television show is .4. The probability that Jane watches the show is .5. The probability that John watches the show, given that Jane does, is .7. 1) find probability that both John & Jane

    asked by CC on June 21, 2011
  29. physics

    A theoretical gasoline engine runs with 76 percent efficiency. It is calculated that it expels 3.25*10^4 J of heat. a. Find the heat absorbed in one cycle. b. Find the work output in one cycle. All this comes from the definition of efficiency.

    asked by anonymous on March 19, 2007
  30. Algebra 2

    An employee drove to work on Monday at 45 mi/h and arrived one minute early. The employee drove to work on Tuesday, leaving home at the same time driving 40 mi/h and arriving one minute late. a. How far does the employee live from work? b. At what speed

    asked by Anonymous on November 1, 2011
  31. algebra

    The rectangular floor of a shed has a length 4 feet longer than its width, and its area is 140 square feet. Let x be the width of the floor. (a) Write a quadratic equation whose solution gives the width of the floor. (b) Solve this equation.

    asked by bulatsu on July 8, 2012
  32. science (chemistry)

    I have to do this lab where I titrate Na2CO3 with HCl dilute solution but i had to add Methyl orange indicator to the solution and im not sure what the endpoint is supposed to be colored, is it supposed to be orange or pink?? im confused and just how

    asked by christina on June 21, 2007
  33. Chemistry

    Let us assume that Cu(OH)2(s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq) (presented in the transition) would go to completion. If you had a 0.300 L solution containing 0.0230 M of Cu2+(aq), and you wished to add

    asked by Anonymous on December 6, 2015
  34. English

    Which sentence is preferable? A. Everyone did his work quietly. B. Each person did their work quietly. C. Everyone did their work quietly. D. Everyone worked quietly. D

    asked by Angela on April 15, 2014
  35. walden

    4.During the energy crisis of the 1970s, and again in the last 5 years, Congress bemoaned the “price gouging” and “windfall” profits of the major oil companies. In the 1970s Congress imposed an “excess profits tax” on these companies. It did

    asked by lafay on September 4, 2013
  36. ecnomics

    4.During the energy crisis of the 1970s, and again in the last 5 years, Congress bemoaned the “price gouging” and “windfall” profits of the major oil companies. In the 1970s Congress imposed an “excess profits tax” on these companies. It did

    asked by Cynthia on November 5, 2014
  37. physics

    A 5.40 Kg package slides 1.47 meters down a long ramp that is inclined at 11.6 degress below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.313. Calculate the work done on the package by friction. Calculate the

    asked by clariza gonzalez on December 3, 2012
  38. Business: Help Is Needed ASAP

    Help Is Needed ASAP Hi, Please help me! I need to know is these is the correct answer for these questions. Thanks for your help! Some countries try to hold the value of their currency within some range against an important reference currency. This is

    asked by Brandy on November 17, 2014
  39. chemistry

    1. When performing this experiment, a student mistakenly used impure KHP to standardize the NaOH solution. If the impurity is neither acidic nor basic, will the percent by mass of acetic acid in the vinegar solution determined by the student be too high or

    asked by anonymous on March 23, 2014
  40. HCS/335

    Are laws and regulations the problem or the solution in addressing ethical problems? Explain. What would be an alternative? I got this from ms.sue and i need to strech it into 300 words? can anyone help me? Laws and regulations help in guiding human

    asked by Tina.....HELP PLZ on February 2, 2011
  41. Mathematics in banking

    An investor has up to $90000 to invest in three types of investments.Type A investment pay 12% annually and have a risk factor of 0. Type B investment pay 20% annually and have a risk factor of 0.06. Type C investment pay 24% annually and have a risk

    asked by Zoroh on October 21, 2017
  42. rate laws and concentrations :: Chemistry.

    A student studied the kinetics of the reaction of sodium hypochlorite and a vegetable dye by the method of pseudo order. He mixed 5 mL of a 0.67 M solution of NaOCl with 15 mL of a vegetable dye, he took a portion of the mixture and absorbance was measured

    asked by JACOBY on June 16, 2010
  43. Physics

    A certain amount of work is required to stretch a spring from its equilibrium position. (a) If twice the work is performed on the spring, the spring will stretch more by a factor of (1)square root of 2 (2)2,(3)1/square root of 2, (4)1/2. Why? (b) If 100J

    asked by Ricky on October 10, 2017
  44. English

    This question asks about your work in your reading role. You may use your novel to help you answer the question. Think about the work you completed in your reading role. Determine the ideas that would be most worthy to share in a literary discussion about

    asked by Madison Dreyer on May 14, 2019
  45. math

    Assume that the average annual salary for a worker in the United States is $32,000 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000. Find the following: (A) What percentage of Americans earn

    asked by Rashonda on July 19, 2012
  46. Trigonometry- Application of Sine and Cosine Law

    Q: A 4m flag pole is not standing up straight. There is a wire attached to the top of the pole and anchored in the ground. The wire is 4.17m long. The wire makes a 68 degree angle with the ground. What angle does the flag pole make with the wire? Show all

    asked by Jane on February 12, 2019
  47. statistics

    I have a data set for MLB teams. the assignment is to form a hypothesis based on the set. h0- Teams with higher attendance will have a better ERA h1- attendance will not effect the ERA Preform a 5 step hypothesis test and show work for z and t test. I am

    asked by Luke on May 8, 2010
  48. algebra

    In a basketball game, a regular basket was worth 2 points and a long-distance basket was worth 3 points. If there were 45 baskets in a game and 96 points total, how many regular baskets r and long-distance baskets l were made? Show the correct system of

    asked by Sophie on December 21, 2012
  49. physics

    A big brass lantern hangs from three chains as shown below. The chain C1 is at an angle of 50.0 deg below the horizontal, while the chain C2 makes an angle of 60.0 deg with the vertical. These two chains join at knot K and the lantern hangs from the

    asked by Ryan on October 29, 2009
  50. Physics

    1.when a train pulls a wagon, is the work zero because wagon pulls on the train with equal opposite force(newton's third law)? 2.what is negative net work and when it is done an on object, does it reduce objects kinetic energy? 3.if the work done on an

    asked by Casey on October 27, 2007
  51. Algebra

    The sum of the charges of the quarks in a particles gives the overall charge of the particles. Two up quarks and a down quark make a proton, which has a charge 1. On the other hand, two down quarks and an up quark make a neutron, which has a charge 0. What

    asked by Cassie on March 1, 2009
  52. Algebra

    The sum of the charges of the quarks in a particles gives the overall charge of the particles. Two up quarks and a down quark make a proton, which has a charge 1. On the other hand, two down quarks and an up quark make a neutron, which has a charge 0. What

    asked by Cassie on March 1, 2009
  53. Statistics

    Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature (°𝐹) 𝑎𝑡 6 𝑝𝑚: 98.0,97.6,98.8,98.0 Assume the sample data are

    asked by Nick on April 26, 2016
  54. physics

    John and Barry are pulling on a fence post with ropes while their friend Pat uses a chain-saw to sheer it at ground-level. John applies a force of 75.0N [40*] on one rope while Barry applies a force of 85.0N [340*] on the other rope. What is the net force

    asked by khklhkjh on November 29, 2013
  55. Algebra

    A. A bowling ball is dropped from a height of 35 feet write a function that gives the height h (in feet) of the bowling ball after t seconds H(t)=__ B. Find the height of the bowling ball after 1 second C. How long does the bowling ball take to hit the

    asked by Kylet davis on March 2, 2016
  56. Algebra

    A. A bowling ball is dropped from a height of 35 feet write a function that gives the height h (in feet) of the bowling ball after t seconds H(t)=__ B. Find the height of the bowling ball after 1 second C. How long does the bowling ball take to hit the

    asked by Kylet davis on March 2, 2016
  57. chemistry

    Ok, I really need to know how to work problems like these so could someone please show me how to set it up?! Given this data: 1. C(graphite) + O2(g) produces CO2(g), delta H = -393.5 kJ 2. H2(g) + 1/2 O2(g) produces H2O(l), delta H = -285.8 kJ 3. Ch3OH(l)

    asked by lavonne on November 23, 2010
  58. college-Linear Algebra

    Let V={f(x)=c0 + c1x + c2x2 : ç01 f(x)dx=1}. In other words, V is the set of all polynomials of degree 2 or less such that their integral from 0-1 is equal to 1. a)Show that the sum of two polynomials in V is not in V b)Show that an affine combination

    asked by Amanda on October 29, 2008
  59. Math

    Let V={f(x)=c0 + c1x + c2x2 : ç01 f(x)dx=1}. In other words, V is the set of all polynomials of degree 2 or less such that their integral from 0-1 is equal to 1. a)Show that the sum of two polynomials in V is not in V b)Show that an affine combination

    asked by Amanda on October 29, 2008
  60. Statistics

    The arena has a policy of selling as many as 16 tickets for a show for which there are only 15 seats available. The manager has noticed in the past that only 88% of people who purchase a ticket annually come for the show. Find the probability that if 16

    asked by Probability on June 29, 2013
  61. Abstract Algebra

    Let A= -{-1}, that is, the set of all real numbers except -1. Define an operation on A by a*b=a+b+ab (usual addition and multiplication in R) a) Show that * is closed on A b) show that * is associative c) Find the identity element for * and verify that it

    asked by Molly on February 22, 2011
  62. maths

    i will be greatful to you if you help in solving the below problems: 1.)Prove that log15=log5+log3 2.)Show that log10800=4log2+3log3+2log5 3.)show that log108/605=2log2+3log3-log5-2log11.

    asked by srikar on April 27, 2012
  63. Math

    Determine the zeros of the function 3x^2 -8=10x. I know I rewrite it as 3x^2 -10x-8 = 0 But then what do I do-I'm totally confused-Answers are {-2,4} {2,4} {-2/3,4} {2/3,4} Please direct me or show the steps, just don't give me the answer because I still

    asked by Beth Anne on September 28, 2010
  64. Calculus

    Kayla claims that she can find an approximate value for sin 1o without using a machine to do any computations. Explain or show how she can do this (Hint: if you choose to explain the process, please be very specific. If you choose to show how it is done,

    asked by Demi on February 22, 2017
  65. prelag8

    The All-In-One cable TV network takes a random sample of viewers that watch the network to get their opinion on a new TV show. They then advertise the following: “Ninety percent of all viewers rate our new show as the best they have ever watched.” Why

    asked by bigurl1.4 on December 18, 2013
  66. Math

    Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and

    asked by John on June 9, 2016
  67. Physic

    If a 35 g arrow moving at 160 km/h penetrates a block of wood suspended by a rope, what impulse is delivered to the block? (Answer: 1.56kg * m/s) What velocity will the wood block acquire if its mass is 7.0 kg? Ignore the mass of the arrow compared to that

    asked by Anonymous on April 22, 2014
  68. algebra

    Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and

    asked by Kassie on June 9, 2016
  69. ALGEBRA

    Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and

    asked by Sally on June 9, 2016
  70. Physics

    Two masses m are attached to two vertices of an equilateral triangle made of three massless rods of length l. A pivot is located at the third vertex, and the triangle is free to swing back and forth in a vertical plane. If it is initially released from

    asked by Anonymous on October 10, 2012
  71. Language Arts HELP NEED !!!!!!!

    1)In all together now, Barbara Jordan's main purpose is to a)persuade readers that a tolerant society is best created by working on a small scale. b)inform readers of the civil rights movement in the United States. c)praise the work of the leaders of the

    asked by itxhel on November 25, 2015
  72. Pre Calc

    I am familiar with this type of problem but can't seem to get the right answer. Use the given zero to find the remaining zeros of each function f(x)=x^4-9x^3+7x^2-91x-348,zero 5-2i I normally would use synthetic division with the root 5-2i bringing it down

    asked by Zach on November 13, 2009
  73. Chemistry

    List the grams of bleach solution necessary to provide 0.931g of NaClO(laundry bleach is 8.25% NaClO by weight) and the mL of bleach solution that contains the necessary amount... NaClO=74.442 g/mol. Need 0.931 grams of NaClO. Density of NaClO solution is

    asked by Niki on February 10, 2016
  74. chemical kinetics

    at 100C the gaseous reaction A==2B+C is observed to be first order.on starting with pure A it is found that at the end of 10min,the total pressure of the system is 176mmHg,and after a long time the total pressure of the system is 270mmHg.a).determine the

    asked by Anonymous on December 9, 2011
  75. Algebra--Correction?

    Solve the absolute value equation. I I will represent absolute value I 2x-4 I -1= 11 Would the solutions be x=8 and x= -4? * Algebra - Reiny, Tuesday, October 13, 2009 at 5:41pm I just mentally tested x=8. It did not work in your equation take the -1 to

    asked by Anonymous on October 13, 2009
  76. science

    Calculate the volume of solution that has a vapour pressure of 25.8 mbar and contains 200.3 g of galactose, C6H12O6, at a temperature of 22.0 °C. The vapour pressure of pure water at 22 °C is 26.40 mbar, the density of water is 1.00 g mL-1, and assume no

    asked by Jane Smith on June 5, 2015
  77. physics

    A rod with length L and mass m stand on a frictionless table. a ball with mass m and speed u cimped perpendicular to the rod a distance x from the bottom of the rod and sticks to it. what is the angular velocity of the rod+ball after the collison? I need

    asked by david on January 27, 2015
  78. MATH

    Briana is allowed to watch no more than 5 hours of T.V a week. So far this week, she has watched 1.5 hours. Write and solve an inequality to show how many hours of T.V Briana can still watch this week.

    asked by Dakota on January 17, 2014
  79. Trig identies, Calculus

    Use the identities cos^2 x + sin^2 x =1 and cos2x=cos^2 x -sin^2 x to show that cos^4 x -sin^4 x = cos2x Im not sure how, I can solve my problem with half angle identities but im not sure where to start with this.

    asked by Anon on February 25, 2017
  80. Statistics

    You are a real estate agent and you are trying to predict home prices for your clients that want to list their house for sale. You have a very small city without much data. You will need to use the data that you have available for the past year on homes

    asked by Kathryn on June 2, 2013
  81. 8th grade math

    dividing fractions....how do i solve this... 4/9 divided by 2/3= or 9/10 divided by 9/10= One thing I do remember is how to divide fractions! 4/9 divided by 2/3 = 4/9 multiplied by 3/2 Then once you've multiplied across, reduce the resulting fraction if

    asked by taya on September 20, 2006
  82. Physics doppler effect

    A radar device emits microwaves with a frequency of 4.73E+9 Hz. When the waves are reflected from a van moving directly away from the emitter, the beat frequency between the source wave and the reflected wave is 751 beats per second. What is the speed of

    asked by Joan on May 16, 2011
  83. math

    The grass of a lawn grows slower the larger it gets. The length of the grass L is expressed in cm and the growth of the grass W in mm/day. If the grass is 2.7 cm tall at the end of day X, than it will be taller than 4cm 20 days later (assuming it will not

    asked by jacob on April 3, 2016
  84. chem help

    You need to produce a buffer solution that has a pH of 5.08. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The of

    asked by chem on February 28, 2009
  85. algebra

    pedro and juan can do a piece of work in 3( 3)/(7) days. if pedro works in 3 days and juan in 4 days, they will finish the work. find the time required by each to do the work.

    asked by irish on October 26, 2016
  86. Algebra

    pedro and juan can do a piece of work in 3 3/7 days. if pedro works in 3 days and juan in 4 days, they will finish the work. find the time required by each to do the work.

    asked by Park on October 31, 2016
  87. Statistics

    Hello. I would like to ask a college statistics question. Q. One hundred draws are made at random with replacement from the box [1,2,2,5]. The draws come out as follows:17 [1]'s, 54 [2]'s, 29 [5]'s. Fill in the blanks, using the options below; show work.

    asked by Daniel on March 28, 2013
  88. precalculus

    Can you check my answer? Which of the following shows the best next step to prove the following by mathematical induction? 1+4+7+10 + + (3n-2)=n/2(3n-1) 1.When n=1, the formula is valid because (3*1-2)=1/2(3*1-1) (3-2)=1/2(3-1) 1=1/2(2) 1=1 A. You must

    asked by sally on December 15, 2016
  89. College Algebra

    How to find the values of x,y and z and to show the condition stated below? 2yz + zx − 5xy = 2 yz − zx + 2xy = 1 yz − 2zx + 6xy = 3 Show that xyz = ±6 and find all possible values of x, y and z.

    asked by Darone on October 11, 2014
  90. Math

    Find the points of intersection of the parabolas y=1/2x^2 and y=1-1/2x^2. Show that at each of these points the tangent lines to the two parabolas are similar Answer (+-1,1/2) Please show and explain all steps thank yo

    asked by Jason on November 6, 2013
  91. Trig

    Can you show us how to use law of cosines to show that theta equals inverse cosine of (a^2 + b^2 -484)/(2ab) where a^2=(7+xcos a)^2 + (28-xsin a)^2 and b^2=(7+xcos a)^2 + (xsin a -6)^2? Thanks

    asked by Lisa on April 17, 2012
  92. electromagnetism

    two equal positive charges q are on the y axis,one at y=+a and the other at y=-a. a)show that the electric field on the x axis with < Ex=2kqx/(x^2+a^2)^3/2 > . b)show that near the origin,when x is much smaller than a,E,is approximately 2kqx/a^3.

    asked by mintesnot on March 27, 2015
  93. Math Word Problem

    A carpenter is cutting a 3ft by 4ft elliptical sign from a 3ft by 4ft piece of plywood. The ellipse will be drawn using a string attached to the board at the foci of the ellipse. A)How far from the ends of the board should the string be attached? B)How

    asked by John on April 29, 2009
  94. Chemistry

    Henry constant for the dissolving of nitrogen in water was reported as 7e-4 mol/Latm at 20 deg Celsius. What is the value of the equilibrium constant, K, at 20 deg Celsius for the process N2(g0)=N2(aq). If the amount of nitrogen in aqueous solution is .1

    asked by Anonymous on January 31, 2014
  95. Chemistry

    Henry constant for the dissolving of nitrogen in water was reported as 7e-4 mol/Latm at 20 deg Celsius. What is the value of the equilibrium constant, K, at 20 deg Celsius for the process N2(g0)=N2(aq). If the amount of nitrogen in aqueous solution is .1

    asked by Anonymous-PLEASE HELP!! on February 3, 2014
  96. Chemistry

    Metal cations can act as lewis acids in water to produce an acidic solution even though the metal ion contains no hydrogen. Water hydrates the ions in solution and partial loss of electrons from water allows hydrogen ion to be lost What is the pH of a

    asked by Jude on April 16, 2011
  97. arithmetic

    1. The first and last term of an A.P are, a and l respectively, show that the sum of nth term from the beginning and nth term from the end is a + l. 2. If mth term of an A.P be 1/n and nth term be 1/m, then show that its mnth term is 1. 3. The sum of four

    asked by kartik hans on May 24, 2014
  98. Math check 2

    Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) (t-24) + 7(t+7)=3(t-8) solve for t. The choices are: a.)-97/5 b.)122/5

    asked by Shawn on October 12, 2008
  99. Math

    I need some help with checking my awnsers on a math quiz please. 1. Solve the equtaion. 3x-3=_18 2. 12+4m=24 3. No more then 12 people can enter the haunted house every 10 minetus. Write an inequality. 4. Solve the inequlity. d-6>_4

    asked by Sugar and Spice and Everything Nice on May 16, 2019
  100. Gr. 11 biology

    Your aunt moves out of the town and leaves you her mouse, Henry. In order to make some money, you decide to breed mouse and sell the offspring. In looking over Henry's family history, you discover that Henry's grandfather expressed a rare genetic disorder

    asked by Helen on October 3, 2015

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