Posts by d

Total # Posts: 469

  1. Mathematics 1 of 3

    1. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. (5x^3 + 3x^2 - 7x + 10) - (3x^3 - x^2 + 4x - 1) 2. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. (9w - 4w^2 + 10) + (8w^2 + ...
  2. Math

    Determine if the number is written in scientific notation. If not, explain; 3 x 100??. A. No; it is not written as a power of 10. B. No; the first factor is not a number between 1 and 10. C. Yes; the number is written in scientific notation. I'm almost 200% the answer is A
  3. Math

    Thanks Ms.Sue!!
  4. Math

    a. Do some research and find a city that has experienced population growth. Determine its population on January 1st of a certain year. Write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of ...
  5. chemistry

    Please balance magnesium sulfate and iron III acetate
  6. Math

    How would I do these? 6. The speed of sound is approximately 1.2 × 10³ km/h. How long does it take for sound to travel 7.2 × 10² km? Write your answer in minutes. 7. Evaluate the function below over the domain {-1, 0, 1, 2}. As the values of the domain ...
  7. Science

    How is velocity different from speed?
  8. Science (Last question of these)

    Ball A, with a mass of 10kg, is moving to the right at 20 m/s. Ball B is moving to the left at 20 m/s. Upon collision, Ball B comes to a standstill, and Ball A moves to the left at twice its original speed. What is the mass of ball B? How do I do this?
  9. Science

    Thank you SO MUCH!
  10. Science

    Ball B, with a mass of 30kg, is moving to the left at 10 m/s. With what velocity should Ball A, with a mass of 10kg, move to the right and collide with 2, so that ball A rebounds with a velocity of 30 m/s, and Ball B with velocity of 10 m/s, after the collision? Assume the ...
  11. Science

    Wait so I'm trying to solve for the V?
  12. Science

    Ball A, with a mass of 20 kg, is moving to the right at 20 m/s. At what velocity should Ball B, with a mass of 40 kg, move so that they both come to a standstill upon collision? How do I solve this?
  13. chemitry

    Liquid sodium is being considered as an engine coolant. how many grams of liquid sodium (minimum)are needed to absorb 3.60 MJ of energy(in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 degree celcius? use Cp=30.8 J/(K.mol) for Na(l) at...
  14. History

  15. social studes

    Which of the following was not a sign of the breakdown of royal government in Georgia?
  16. Physics

    The buoyant force is the force up on the sphere exerted by the fluid and down on the fluid by the sphere Nothing is accelerating. The string is still holding the rest of the sphere weight (most of it). Therefore 2.19 N is the buoyant force = rho fluid *g * volume of sphere g ...

    Simplify the expression: 15 ? 3[2 + 6(?3)]
  18. Science

    PLEASE DO NOT THINK I AM CHEATING AND ASKING FOR ANSWERS. DO NOT LECTURE ME, I AM SIMPLY ASKING WHAT IN THE HELL THIS MEANS: Collecting and Analyzing Data There are two types of observations: qualitative and quantitative. Qualitative observations use words to describe what is ...
  19. Math

    If centripetal force acts towards the center of a circle, why do we get pushed to the outside of the circular path when rounding a curve? What is responsible for this sensation? Some have erroneously referred to this sensation as a centrifugal force. What do you think is ...
  20. Physics

    Reason for 3 m/s
  21. math

    Thank you so much!
  22. math

    Kevin had $15 with him. His mother gave him $10 and his father also gave him some money. After this, he had a total of $37 with him. How much money did his father give him? Write an equation with a variable and state what the variable represents.
  23. math

    Thank you!
  24. math

    Well 18 / 3 = 6 would give the answer but that does not have a variable so I really don't know how to do this.
  25. math

    As part of a school science project, Jacob bought some bulbs for a total of $18. The cost of each bulb was $3. How many bulbs did Jacob buy? Write an equation with a variable and state what the variable represents.
  26. Math

  27. Chemistry

    Consider the reaction: 2CH4(g) + 3O2(g) + 2NH3(g) --> 2HCN(g) + 6H2O(g) If 203.5 g NH3 is reacted with excess CH4 and O2, what mass in grams of HCN can be produced?
  28. chemistry

    Given a 1.00 L solution that is 0.60 M HF and 1.00 M KF, calculate the pH after 0.080 mol NaOH is added, and calculate the pH after 0.24 mol HCl is added to the original solution.
  29. algebra

  30. math

  31. ELA plez help

    what statement is true about dialogue? 1.The words each character says are enclosed by quotation marks 2. the words each character says appear next to the characters name. 3. The words that the main character says appear in italics or brackets 4. the words that address the ...
  32. Hot math questions

    no, 2 s - 1
  33. Math

    draw a line perpendicular to the first one what is its slope? original line: y = -7 x + 2 so the original slope is -7 slope of perpendicular = -1/-7 = 1/7 now make that perpendicular go through (-1,-3) -3 = (1/7)(-1) + b -3 +1/7 = b b = -20/7 so our line is y = (1/7)x -20/7 ...
  34. math

    You flip a fair coin 10,000 times. Approximate the probability that the di fference between the number of heads and number of tails is at most 100.
  35. Language Arts

  36. Language Arts

  37. physics

    A crate with a mass of (111.5) kg is lifted by a crane. If the crate is accelerating upward at (2.7) m/s2, what is the tension in the cable? Give your answer in newtons (N) and with 3 significant figures.
  38. Math

    If a water bottle holds 1.5 litters of water if I open a new bottle an drink half how much water is left
  39. Chemistry

  40. math

    Which sentence correctly describes a data set that follows a normal distribution with a standard deviation of 4 and a mean of 14? 68% of the data points lie between 10 and 14. 68% of the data points lie between 8 and 12. 68% of the data points lie between 10 and 18. 68% of the...
  41. finance

    the school you would like to attend costs 100,000, to help finance your education you need to choose whether or not to sell your 1000 shares of Apple stock , 1000EE Savings Bonds (with denominations and 4.25% coupon rate) that are five years from their 30-year maturity date of...
  42. finance

    I believe the best response would be to go with the 100 shares of the company stock in which may provide a higher percentage of revenue within the next few years. Although the 5000 bonus can be in your checking account today, you are able to receive more income with the ...
  43. Algebra 1- Urgent

    Part A: Sam rented a boat at $225 for 2 days. If he rents the same boat for 5 days, he has to pay a total rent of $480. Write an equation in the standard form to represent the total rent (y) that Sam has to pay for renting the boat for x days. (4 points) Part B: Write the ...
  44. english 3

    What specifically was Dr. Martin Luther King Jr. speaking out against when he made this statement in 1958? “I could never adjust to the separate waiting rooms, separate eating places, separate rest rooms, partly because the separate was always unequal, and partly because ...
  45. Math

    Jeremy loves right triangles that have side length 1. In fact, he loves to combine them so that the hypotenuse of one becomes the leg of the next. If the longer leg of the first triangle is sqrt 11, what will be the hypotenuse of the 2014th triangle? I don't understand ...
  46. social studies (NEED HELP QUICK)

    This is not a school website. You have a school website complete with teachers. Looking up answers here is CHEATING.
  47. Math

    Why are you wasting so much time on this website, "Smiley"? That is what you have teachers for!
  48. MATH

  49. U.S. History

    thank you all!
  50. U.S. History

    1. What would this image convey to someone from the early-1900s about about the suffrage movement? (image: "early-1900s women's suffrage painting"-- this has a sign on it that says "official program women's suffrage procession" a person riding a ...
  51. Math

  52. Math2(Reiny Please Help)

    0.02(3s^2+20s)=50 3s^2+20s=2500 3s^2+20s-2500=0 x=25.725992956937827 =25
  53. Geometry

  54. Trigonometry

    a line which passes through the origin contains point A (-0.714, 0.700) . find the gradient of the line and the angle formed with respect to the positive x-axis in Degrees
  55. reading comprehension

  56. English

    What in the world r u guys saying, especially A?
  57. English

    What's happening
  58. physics

    Find the time constant (T) for the RC circuit with an open switch given t = 10 ms 50% of Qmax charge T = ? Q = CV (1-e -t/T)
  59. math

    Math answers please
  60. math

  61. Math

    So what are the answers?
  62. english

    bad impact on their lifestyle give me a better word then bad please
  63. Math

    then what is it '
  64. Math

    What do u do to get the answer by solving on paper
  65. Social Studies Check my answers!

    ^ dead lmfao
  66. Chemistry

    Pb + S yield FeS
  67. English

    What where the answers
  68. chemistry

  69. ai

    Ellen drove 240 miles in 3.5hours. To the nearest tenth, find Ellen's average speed in miles per hours
  70. Math

  71. pre algebra

  72. chemistry

    Sodium hydroxide
  73. Science

    Your teacher says looking here for the answer is cheating.
  74. Math

    What is the missing number from this number sentence? 7 ? 16 31 I'm always confused with this.
  75. Math

    What is the missing number from this number sentence? 7 ? 14 31 I'm always confused with this.
  76. reading

    nto the solemn church, and scatter the congregation, Into the school where the scholar is studying, Leave not the bridegroom quiet—no happiness must he have now with his bride, Nor the peaceful farmer any peace, ploughing his field or gathering his grain, So fierce you ...
  77. chemistry

  78. precalc

    D(x) = x^2+2x E(x) = -2/(5x-1) D/E=
  79. precalc

    are these correct? 1) y=4 2) x=2 4) y=-3x-1 5) y+4=2/3x+1 6) y=4x+5
  80. precalc

    write a linear equation to fit each situation or description. 1) the line through (2,4) parallel to the x axis. 2) the line through (2,4) perpendicular to the x axis. 3) the line through (3,1) perpendicular to y=4x-3. 4) the line through (-2,5) parallel to y=-3x. 5) the line ...
  81. Science

    U R HYPOCRITE--NO, this is your teacher. QUIT CHEATING!
  82. Science

    NO, this is your teacher. QUIT CHEATING!
  83. pre-calculus

    Rewrite each equation into slope intercept or special case form. 1) 4x+3=8x 2) 9y-(7+3y)=0 I have no idea how to do these two. Can someone please help me? 3)x/2+y/7=1 My answer is y=-7x+14. Is this correct?
  84. pre-calculus

    h(t)=15t + 1200 is a function that models the motion of a mountain climber. h(t) is his height above sea level at time t in minutes. 1a) the coefficient on t is 15. what does it tell you about the motion of the mountain climber? 1b) what does it tell you about the graph of h(t...
  85. Chemistry

    What is the sign of the entropy change for the following reaction, which is the principal process taking place when mortar hardens? Ca(OH)2(s) + CO2(g) ---> CaCO3(s) + H2O(l) Would the sign of entropy be negative since a solid and gas yields a solid and what does it mean by...

    @Stephen she can see your IP address on this site.
  87. english

  88. Chemistry

    A 360-mL sample of hydrogen is collected when the pressure is 800 mm Hg. What is the volume that the gas will occupy when the pressure is 720 mm Hg? 360/x=720/800 28800/720=720x/720 400-mL=x Am I correct?
  89. Math

    Hint: 6% x $1,000,000 / $1,000,000 – {20% x ($1,000,000 – (6% x $1,000,000))] = ?
  90. Math 1

  91. chemistry

    Aqueous ammonia is commercially available at a concentration of 16.0 M. Part A How much of the concentrated solution would you use to prepare 500.0mL of a 1.30M solution?
  92. english

    1, 2, and 5 should be A. Am I correct?
  93. english

    can you please tell me if i'm correct or not? write A if the sentence is active or P if it is passive. 1. max and his uncle towed the car to a downtown garage. P 2. lightning hit our house during last night's storm. P 3. the opening remarks were made by the president ...
  94. physics

    If the speed of sound in air is 340 m/s, what is. approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 134 Hz? Answer in units of cm.
  95. physics

    The distance between two consecutive nodes of a standing wave is 22 cm. The hand generating the pulses moves up and down through a complete cycle 3.89 times every 4.68 s. Find the velocity of the wave. Answer in units of m/s
  96. physics

    An automobile having a mass of 1330 kg is driven into a brick wall in a safety test. The bumper behaves like a spring of constant 4.12 × 106 N/m and compresses 4.99 cm as the car is brought to rest. What was the speed of the car before impact, assuming no energy was lost...
  97. physics

    The body of a 1285 kg car is supported on a frame by four springs. The spring constant of a single spring is 2.80 × 104 N/m. Four people riding in the car have a combined mass of 275 kg. When driven over a pothole in the road, the frame vibrates and for the first few ...
  98. Math

    so what are the tests answers? Please
  99. math

    how do you create of six values that does not represent a linear relation. All the y-values must increase in value as x increase in value?
  100. math

    Please help me on linear relation. I have tries but I am really stuck on the creating table and graphing. 1. provide a table of six values that represent a linear relation. All the y-values must be less then zero. 2. provide a table of six values that does not represent a ...
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