1. algebra

    Please help with: Express the system as an augmented matrix and solve using Gaussian elimination. x=+2y+z=3 2y+3z =2 -x+2z = 1
  2. algebra

    PLEASE help. Solve the system of equations by first expressing it in matrix form as and then evaluating. a). 3x-2y=5 4x-y =-10 b). 3x -2y =-2 4x -y = 3
  3. social studies

    how can we say that the democracy is the only best system of good governance for a country.
  4. pre algerbra

    Please solve the system with the elimination method. Explain each step as it is performed. 5y = x 2x - 3y = 7
  5. algebra

    Solve the following system of equation using the graphing method. Y = negative X Y = X + 9 Don't know what to do. Thank u if u can helpme.
  6. algebra

    Given the system of equations x(x+y)=9 y(x+y)=16 the value of xy can be written as a/b where a and b are positive coprime integers. Find a+b.
  7. Phyics

    The internal energy change in a system that has absorbed 4 Kcals of heat and 1000 J of work is:
  8. chemistry

    Explain why exothermic processes are mire likely spontaneous when temperature of the system is low?
  9. math

    x^2+16xy+y^2-8=0 Write the appropriate rotation formulas so that in a rotated system the equation has no x'y'-term
  10. Sociology

    8 complete sentences, compare and contrast the kinship and marriage system of the Kaluli and the Minangkabau.
  11. Social studies

    How did monteqeieus system reflect John lockes ideas about government ?
  12. eonomics

    Unions limit the operation of: A. democracy B. the justice system C. market forces D. the military
  13. economics

    Unions limit the operation of: A. democracy B. the justice system C. market forces D. the military
  14. College Algebra

    Solve system by method of elimination 0.07x + 0.02y =-0.07 0.08x - 0.06y = 0.07
  15. TO ANY MATH HELPERS

    Pleeeese help! Use the substitution method to solve each linear system: -x+3y+1=0 3x-y+1=0 4x-3y=-13 -2x+y=4 Please help, thanks:):)!!!!
  16. American History

    Policy-making in the Federal System national government's education policies
  17. Algebra

    What would the solution to this system of equations be? y = x - 50 y = 0.6x I got (138.8, 83.3), but that doesn't seem right at all.
  18. Math help mrs sue

    When solving A system by graphing how can you tell if the solution is the equation of the line
  19. Math

    Why animals and plants are found on earth but are not on other planets of the solar system? Please ,,help me
  20. math

    Suppose you try to solve a system of linear equations using substitution and get this result. 1. x=-2 2. y=12 3. 6=x 4. -8=-8 5. 7=y 8. 5=3
  21. Physics

    I don't understand this question... What is the change in entropy for a system that has 250 J of heat added to it at 25°C? (Points : 1) 10 J/K 0.84 J/K 0.84 J/K 10 J/K
  22. Math - PreCalc (12th Grade)

    Use the inverse matrix to solve this system of equations: 4x+3y=7.5 7x+9z=14 4y-z=8.3 4,3,0 7,0,9 0,4,-1
  23. chemistry

    What is the change in the internal energy of the system when 1.243 mol of NH 3(g) is formed from N 2(g) and H 2(g) at 25 degrees C and 1.0 atm?
  24. Human & Physiology

    Discuss the critical and intricate roles the nervous system plays in homeostasis
  25. English

    What's a good introduction on this topic? Should the Canadian health-care system be privatized?
  26. Education/College

    In what ways does understanding the origins of the educational system in the U.S. be useful to me as a future educator?
  27. Math

    How would I find the solution set for a system of linear inequalities? For example, x-3y<10 3x-2y≥5
  28. math!

    Find the solution to the system by the substitution methond. y=4x-4 y=5x a.(1,0) b.(-4,-20) c.(4,0) d.(-3,-15) (Im confused !!!please explain to me how get the answer)!
  29. MATHS

    I WANT FREE PRACTICE PAPER OF NUMBER SYSTEM,WHOLE NUMBERS,INTEGERS,PICTOGRAPH
  30. Operating system

    create a chart showing milestone in memory growth and the approximate date.
  31. Algebra 2 Answer Check

    Classify each system and determine the number of solutions. {3y = 2x; -4x + 6y = 3 A: inconsistent; no solution
  32. science

    The primary unit of length in the metric system is the: kilometer meter millimeter centimeter
  33. biology

    Where is the location of the phosphatase enzyme in the digestive system. There is no site that i can find that can provide an answer...
  34. Algebra 2

    Solving Quadratic System x^2+4y^2=16 x^2+y^2=4 Please SHOW WORK I'm having trouble solve this...
  35. health

    Alcohol abuse ________ the immune system, which helps protect the body from infections.
  36. science

    Which systems move the human body? I heard there were the skeletal, nervous, and muscular system. ??
  37. MATH

    what is the solution of the system y=-3x 3x+2y=6 a. 2, 6 b. -1, 3 c. -2, 6 d. 1.5, -4.5 I have an answer but I seriously doubt it's wrong. Please help for this one? Thanks
  38. Math

    Solve the following system of equations. Then, write the final answer in (x, y, z) form. -12x+y-x=-20 -2x-4y+2z=10 x+2y+2z=25
  39. Health

    What is the first activity of the digestive system? A. Digestion B. Ingestion C. Movement D. Absorption i pick D.
  40. sociology

    How does one¡¦s place in the socioeconomic system affect their ability to achieve the American Dream?
  41. science

    acrostic poem for "THE NERVOUS SYSTEM" please help been trying all day can get it
  42. health

    i need to find a way to creatviley describe the path of the female reproductive system
  43. math 8

    solve the system of equations 5x+2y=11 3x-4y=4 give answer as decimal if required. any help would be appreciated, thank you
  44. Math

    How many solutions does the system of equations have? 4x+16y=12 y=-1/4x+9/12 a. one b. two c. infinitely many*** d. none
  45. Algebra

    I need help Solving the system of equations algebraically and Showing all the steps involved. y=x^2+2x y=3x+20
  46. academic and communicative skills

    a speech on health care delivery system on a nose dive
  47. Chemistry

    What is the internal energy if system absorbs 100J of heat and does 50J of work on the surrounding?
  48. Science

    Which of the following reasons best explains why scientst need a standard measurement system
  49. Trigonometry

    How do I solve these linear system problems? I solved it many times but it never seems right. 1. x^2 + y^2 =9 2x - y = -6 2.x^2 - x -y =0 x - y = -3 3. 2x^2 - x - y = -1 3x + y = 5
  50. Algebra

    Consider the following system of equations. Solve and write as a coordinate point. 5x+4y=-14 3x+6y=6 Please help and thanks
  51. value

    GIVEN THE SYSTEM, SO2 + O2 = 2SO3 WRITE DOWN THE EXPRESSION FOR Kc AND STATE IT UNIT
  52. physics

    a 200kg body raised to a height of 10m. what is the gravitational potential energy of the system?
  53. math

    Solve the system of equations by finding a row echelon form for the augmented matrix. x-2y+z=8 2x+y-3z=-9 -3x+y+3z=5
  54. Algebra 2

    Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4 I am very confused about this. Can someone please explain how to do this?
  55. Algebra

    graph the system of constraints find the values of x and y that maximize the objective function x+y<8 2x+y<_10 x>_0 Y>_0
  56. Chem

    Calculate the value of work, w, for the following system if 26.7 g of NaN3 reacts completely at 1.00 atm and 22 °C.
  57. ECONOMICS

    A REPORT ON WHY THE GOVERNMENT OWNS AND CONTROLS ONLY 30% OF THE RESOURCES IN MIXED ECONOMIC SYSTEM
  58. precalculus

    Which of the following would be the best first step for solving the system of equations by elimination? • 6.3x + 7.2y = 5.4 • 5.6x + 6.4y = 4.8
  59. Gaussian Elimination Method

    Write the system of equations as an augmented matrix. Then solve for x and y. -3x-y=11 -9x-2y=34 Solution =
  60. History

    Converted to the Mayan number system, what would be 152 and 100? I'm confused as to how it's set up.
  61. math plzzz help quick

    What is the y-coordinate of the solution of the system of equations? {y=2x+14 {-4x-y=4 Enter your answer in the box. y =
  62. math plzzz help quick

    What is the y-coordinate of the solution for the system of equations? {x-y=-11 {y+7=-2x Enter your answer in the box. y =
  63. math

    (19) Does the following system of equations have a solution? If it does, find one; if not, explain why not. √ x + √ y = 1 r 4x 9 − r 25y 64 = 1
  64. Science

    Which of these is found inside the solar system? A) Moon B) Nebula C) Galaxy D) Black hole
  65. Algebra

    How many solutions does the system of equations have? y=6x+2 and 3y-18x=12 A. one B. two C. infinitely many D. none
  66. Algebra

    How many solutions does the system of equations have? 3x+12y=20 y=-1/4x+5/3 A) one C) infinitely many B) two D) none
  67. math

    solve this system of equations using the linear combination method -3x+12y=-27 5x+20y=15
  68. TX_HISTORY

    Describe ways in which the reservation system was beneficial to settlers but harmful to the American Indians
  69. Physics

    I am curious how the earth work as an omnipresent conductive surface in an electrical distribution system?
  70. US History

    How did the spoils system affect president James Garfield and his successor Chester A. Arthur??
  71. History

    how did the spoils system affect president james Garfield and his successor Chester A. Arthur?
  72. History

    How did the spoils system affect president James Garfield and his successor Chester A. Arthur?
  73. Chemistry (stuckkk)

    24. Identify a source of error for the experimental design of the cobalt(II)chloride system
  74. physics

    A 2.60 kg steel gas can holds 15.0 L of gasoline when full. What is the average density of the full gas can, taking into account the volume occupied by steel as well as by gasoline? Please show the steps, thanks.
  75. supervision and leadership

    Assume that you are the training supervisor of a large, local retail company. The company has seven department stores in your city. One of your biggest problems is adequately training new salesclerks. Because salesclerks represent your company to the public, the manner in ...
  76. Physics

    a car and a truck start from rest at the same instant with the car initially 50m behind the truck. The truck has a constant acceleration of 2m/s^2 and the car has a constant acceleration of 3m/s^2. The car overtakes the truck after how many seconds? At what speed is the car ...
  77. Psychology

    Sally is driving her car and talking on her cell phone. Statistically this behavior has been shown to be quite dangerous and contributes to many automobile accidents. In performing these two tasks simultaneously, Sally uses: a. conscious cognitive processes b. mindless ...
  78. PSY help

    Sally is driving her car and talking on her cell phone. Statistically this behavior has been shown to be quite dangerous and contributes to many automobile accidents. In performing these two tasks simultaneously, Sally uses: a. conscious cognitive processes b. mindless ...
  79. Psychology

    Sally is driving her car and talking on her cell phone. Statistically this behavior has been shown to be quite dangerous and contributes to many automobile accidents. In performing these two tasks simultaneously, Sally uses: a. conscious cognitive processes b. mindless ...
  80. Chemistry

    Consider the reaction HCHO(g) *) H2(g) + CO(g). 1.0 mol of HCHO, 1.0 mol of H2 and 1.0 mol of CO exist in equilibrium in a 2.0 L reaction vessel at 600C. a) Determine the value of the equilibrium constant Kc for this system. 2.0 moles of HCHO and 1.0 mol of CO are then added ...
  81. Physics

    A hoop of radius 1.4 m and mass 11.5 kg has a small ball stuck to its inside surface. The ball has a radius of one quarter that of the hoop, and twice the hoop’s mass. The hoop may roll freely, without slipping. Similarly, the ball may roll along the inside of the hoop ...
  82. College Algebra

    A mixture of 20% disinfectant solution is to be made from 13% and 23% disinfectant solution. How much of each solution should be used if 40 gallons of the 20% solution are needed?
  83. Physics

    1.A bus travels 400 m between two stops. It starts from rest and accelerates at 1.50 m/s^2 until it reaches a velocity of 9.00 m/s. The bus continues at this velocity and then decelerates at 2 m/s^2 until it comes to a halt. Find the total time required for the journey. 2.A 28...
  84. chemistry

    Okay so I know how I would normally determine molar mass of a compound *get out periodic table, sum up elements present, eg. H20 = [2(1.008)+16.00]g/mol* But this is for a lab class and they want us to derive it. Info found: Ethylene glycol (C2H6O2 according to book) dissolved...
  85. mangement science the art of modeling w/ spreadshe

    Five years ago, an automobile manufacturer started offering an extended warranty to buyers of its sport-utility vehicle.  The extended warranty covered defects occurring after the initial three-year warranty expired.  Of the 10,...
  86. chemistry

    A 2.622 g sample of almond is ignited and used to melt ice in a can. a. if the almond sample melted 15.24g of ice,What is the heat produced in kcal/gram? b. If the heat from the almond sample was used to heat 100.0 mL of water at 0.0 degree centigrade.What would be the final ...
  87. Algebra 2

    A cars fuel efficiency is 24 miles per gallon and can be driven 324 miles with a full tank of gas. Write an expression for the amount of miles that be driven after X gallons have been used.
  88. algebra

    Coulld someone take the time and check my answers please. 11) without graphing is the system independent, dependent, or inconsistent? y=-x+5 -3x-3y=-15 (my answer; dependent) 12) your club is baking vanilla and chocolate cakes for a bake sale. they need at most 19 cakes you ...
  89. chemistry

    Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Water has the highest boiling point. B. H-O-H and C-O-H bond angles are all equal to 1095. C. Dispersion forces affect all three molecules. D. Two lone pairs of electrons are ...
  90. Calculus I

    Hello, The pressure P and volume V of an expanding gas are related by the formula PVb=C, where b and C are constants (this holds in adiabatic expansion, without heat gain or loss). Find dPdt if b=1.6, P=12kPa, V=80cm2, and dVdt=20cm3/min. Thus far, I got d(PV)/dt= p(dv/dt) + V...
  91. health care

    response to the following: Computer technology continues to make rapid advances. Health care facilities have used computer programs for administrative functions such as payroll and billing. How do health care facilities use electronic (or computerized) medical records (EMR)? ...
  92. Chemistry

    Can someone please check my work? Which of the four factors affecting reaction rate is most important in each exampel below? Choose from among concentration, temperature, surface area, and catalyst. a. Extra dish soap is added to help cut the grease when washing a frying pan...
  93. maths

    a conical tank open at the top is 4m and has a top radius of 1m its filled with water and after 2 hours, the depth of water dropped to 1m due to evaporation.set up a differential equation for the depth of water as a function of time.set up an equation for the volume of water ...
  94. Physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration of 3...
  95. chemistry

    For each trial, enter the amount of heat gained by the chemical system of ammonium nitrate, qrxn. The specific heat of water is 4.184 J/goC. Report your answer using 4 digits. The information given is: Trial # Tiwater Tf Masswater #1: 21.2 10.8 24.990 #2: 20.8 9.50 25.000 #3: ...
  96. science

    A car moves 3 kph. Car B which is 50 m ahead of Car A is moving at 6 kph. If car A accelerates by 5m/s/s, determine if the cars will collide
  97. physics

    A car moves 3 kph. Car B which is 50 m ahead of Car A is moving at 6 kph. If car A accelerates by 5m/s/s, determine if the cars will collide.
  98. Physics

    A 2m radius uniform 50kg disk has an object of unknown moment of inertia screwed into its center. A constant external force of 200N is applied tangentially to the disk's rim. A constant torque due to kinetic friction of 180Nmrad is present throughout the motion. The system ...
  99. math 118

    the gasoline gauge on a van read 1/4 full when 10 gallons were added to the tank, the gauge read 2/3 full how many more gallons are needed to fill the tank?
  100. PRE-Algebra

    Water tank A has a capacity of 550 gallons and is 66% full. Water tank B is 53% full. The ratio of the capacity of Tank A to Tank B is 11:15. what is the capacity of tank B?
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