Posts by devin

Total # Posts: 205

  1. math

    for math test ncca/ equations and inequal
  2. math

    Find the perimeter of the given triangle. Round your answer to the nearest tenth if necessary. ?ADF, if ?ADF ? ?BCE, given BC = 17, BE = 9, CE = 12, and DF = 15. ?BCE is inside of ?ADF
  3. Biology

    i changed my answer for #6! I think its D now and for #8 i think that is B now
  4. PLZ

    I think they named it "PLZ" because they wanted someone to please help them. My understanding is that "PLZ" translates to please.
  5. Biology

    I think you right,I'm not sure but I remember answering a question like this and I think it is D.
  6. Calculus

    In a 21 meter race between a turtle and a hare, the turtle leaves 8 minutes before the hare. The hare, by running at an average speed of 0.5 meters per hour faster than the turtle, crosses the finish line 4 minutes before the turtle. What are the average speeds of the turtle ...
  7. Algebra

    Jessie needs to rent a truck for two days to move her belongings to college. She can rent a U- Haul for $35 a day plus 25 cents per mile or she can rent a Budget Rental Truck for $25 per day plus 32 cents per mile. Write an equation and solve to find out how many miles she ...
  8. Social studies

    i just finished this quick check the anwsers are A C D
  9. Social Studies Help!!

    right all correct
  10. Chemistry

    Mole Ratio of Mg : Mg3N2 = 3 b: 1 mole of Mg3N2 = moleofmagnesium over 3 = 8.0mol over 3 = 2.67 mol mass of Mg3N2 = mole * molar mass = 2.67 mol * ((3* 24) + (2 * 14)) g / mol = 2.66.67 I hope that helped you out :)
  11. Chemistry

    Do you have any choices or is it one where you answer it with what you know?
  12. 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 =
  13. Homework

    A poll was taken of 10,439 working adults aged 40-70 to determine their level of education. The participants were classified by sex and by level of education. The results are shown below. Education Level Male Female Total High School or Less 2023 3264 5287 Bachelor's ...
  14. Conditional Probability

    A certain virus infects one in every 400 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. Let A be the event "the person is infected" and B be the ...
  15. Math Antics

    A certain disease has an incidence rate of 0.5%. If the false negative rate is 7% and the false positive rate is 2%, compute the probability that a person who tests positive actually has the disease.
  16. The Value of an Annuity

    What's the answer?
  17. The Value of an Annuity

    Can you help I don't understand. Thanks
  18. The Value of an Annuity

    Don't understand?
  19. Math

    A football is kicked into the air. Its height in meters after t seconds is given by h(t)=-4.9 (t-2.4)^2+29. A. What was the height of the football when it was kicked? B. What is the maximum height of the kick? C. How long did it take for the football to reach its maximum? D. ...
  20. Education education

    Yep the answer is D.
  21. science

    Moose and Messi are correct :)
  22. College Algebra

    The logistic growth function f(t)= 100,000/5000e^-t describes the number of people, f(t), who have become ill with influenza t weeks after its initial outbreak in a particular community. A) How many people became ill with the flu after the epidemic began? B) What is the ...
  23. Math

    Bank A pays 4.79% compounded monthly, while Bank B pays 4.8% compounded quarterly. Which bank pays more?
  24. Math

    A store has a $179.99 item on sale for 25% off. What is the discount on this item?
  25. math

  26. Math

    County fair tickets can be ordered in advance. There is a one time processing fee of $10 per order. Individual tickets cost $3 a piece for rides and food. Write an algebraic expression to represent the total cost for a visit to the fair.
  27. ELA

    What effect does Father’s return have on the Sakane family? A Yuki finds it hard to adjust to having both parents tell her what to do B Yuki’s mother continues to worry about the safety of her family C Ken is relieved that his father will take over as head of the ...
  28. Spanish

    I think its C
  29. Pre-Calculus

    how do i find the vertical asymptote of x−1 / x(x-2) so far i got x-1 / x^2-2x
  30. Chemistry

    What is the order of the reaction for the following reaction and for each reagent given? A + 2B + C --> productions Experiment / A / B / C / rate 1 / 0.002 / 0.15 / 0.132 / 0.0057 2 / 0.002 / 0.25 / 0.132 / 0.0158 3 / 0.003 / 0.15 / 0.132 / 0.0114 4 / 0.003 / 0.15 / 0.264...
  31. math

    Which algebraic expression represents “the difference of 54 and a number”?
  32. math

    You get one spin.what is the probability of spinning a number larger than 6 out of 8.
  33. math

    Kim has fraction 1 over 2 cup of almonds. She uses fraction 1 over 8 cup of almonds to make a batch of pancakes
  34. Hanahan

    Use addition or substitution to find the value of x for this set of equations. 2x - 3y = -15 x = 4y
  35. Chemistry

    66.9 g of a substance X dissolves in enough water to make 0.428 L of a 0.68 M solution. Calculate the molar mass of X in g/mol.
  36. Chemistry

    A 0.885 M solution of sulfuric acid (H2SO4) is to be reacted with a 0.552 M solution of sodium hydroxide to make sodium sulfate and water. How many L of the H2SO4 solution will react with 0.842 L of the NaOH solution? Give your answer to 3 decimal places.
  37. math

    Which quadrilateral has 4 sides of equal length 2 pairs of opposite sides that are parallel and no right angles
  38. Economics

    what is a hype song to rap to a economics question. Like this example: search (I'm on econ) on youtube
  39. math

    Ty needs to cut strips of wrapping paper that are each 9 inches wide.If Ty has 2 rolls of wrapping paper that are 15 feet long, how many 9-inch strips can he cut ?

    3 is wrong its D all others on the spot
  41. Art

    D A C is defiantly right i just submitted it i swear to god
  42. physics

    43. A block of mass 2.00 kg rests on a ramp tilted at 25.0°. Coefficients of friction for the block/ramp: μs = 0.300, μk = 0.100. A string passing over a high quality pulley connects the block with a bucket as shown below. The bucket contains sand but a hole is ...
  43. Science

    ranging minerals from the hardest to the softest. Chalk, fingernail. steel screw and paper clip
  44. Physics

    Ha, goteem
  45. Physics

  46. Physics

    a. (-202i +161k) Just changed the sign to get the answer. b. (75x.640x9.8) = 470.4 equal to the maximum static force
  47. Chemistry

    When a chemist burns ammonia according to the reaction below she finds that the reaction releases heat. (It is exothermic.) 4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g) The enthalpy of the reaction DH = -1267 kJ. What is the enthalpy change (in kJ) when 7 grams of ammonia are burned?
  48. Chemistry

    Calculate the total heat (in Joules) needed to convert 1.602 x 101 grams of ice at -1.383oC to liquid water at 8.554 x 101oC. Melting point at 1 atm 0.0oC Cwater(s) = 2.09 J/goC Cwater(l) = 4.18 J/goC delta Hofus = 6.02 kJ/mol
  49. Physics

    Ur mum
  50. physics

    A plane cruising along at 268 m/s, in straight level flight wants to drops a bomb. He is at a height of 1000m. At what distance should the pilot release the bomb in order to hit his target?
  51. Physics

    (a) How high a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 96.0 km/h? (b) If, in actuality, a 750 kg car with an initial speed of 96.0 km/h is observed to coast up a hill to a height 18.0 m above its starting point, how much ...
  52. 8th grade math

    At 2pm the temperature is 22 degrees, by 4am it is negative 7 degrees. We think the answer in the change of temperature is 29 degrees am I right?
  53. 8th grade Math

    Ok, I came up with 29
  54. 8th grade Math

    At 2pm the temperature is 22 degrees, by 4am it is negative 7 degrees. We think the answer in the change of temperature is 22 degrees am I right?
  55. Urgent--Spanish help! :(

    well i guess she told u!lol
  56. math...

    those anwsers are wrong
  57. Algebra

  58. math

    what is the exponential form of 1000 * 1000
  59. Algebra

    Can anyone please show me how 3^n/6^(2n+1) becomes 1/2^n(6^(n+1))= 1/6)/12^n when you divide top and bottom by 3^n? Thank you and have a great day!
  60. statistics

    To find out what people think, the Gallup Poll selected a random sample of 520 women and 506 men. The pollsters showed them a list of personal attributes and asked them to indicate whether each attribute was “generally more true of men or of women”. When asked about ...
  61. College Chemistry

    1 L of N_2_ gas, having a pressure of 2.5 atm, is added 1 L of Ar gas, having a pressure of 3.7 atm, in a sealed, rigid flask. What is the final pressure in the flask?
  62. math

    How do you solve sqrt(1-(9/x^2))? I know the answer is sqrt x^2 -9/x but I'm not sure how to get the answer on my own. If you could show steps on how to get the answer that would help me a lot!

    C is the answer:)
  64. math

    how do I figure the circumference of race track that takes 3 lap to make a mile?
  65. math

  66. science

    The answer is 14 days I took the quiz.
  67. Science

  68. math

    Jeff Iron $250 on his $5000 certificate of deposit last year. what simple interest rate did the bank pay him?
  69. chemistry

    A 7.56-g sample of gas is in a balloon that has a volume of 10.5 L. Under an external pressure of 1.05 atm, the balloon expands to a volume of 15.00 L. Then the gas is heated from 0.00 degree C to 25 C. If the specific heat of the gas is 0.909 J/g*C, what are work, heat, and ...
  70. Chemistry

  71. Complex Physics Problem

    A ladder can fall for two reasons. If it is set too steep and climber gets their mass to the left of the ladder's base, the ladder likely will fall over backwards. If the ladder is set at too shallow of an angle the required force of friction between the ladder and the ...
  72. College Level Physics

    A horse pulls a cart with a force of 145 newtons at an angle of 30 degrees above the horizontal and moves along at a speed of 2.5 m/s. How much work to the nearest kJ does the force do in 6 minutes?
  73. Physics 1 College Level

    A planet/moon has a mass of 77.89 × 1023 kg and a radius of 7.9 × 106 meters. What is g on the surface to the nearest hundredth of a m/s2? Once again, not really sure where to go with this. Out of the 10 problems I've only had trouble with this and one other.
  74. Physics 1 College Level

    Spaceship is 2.5 x 10^7 kg! Asteroid is 3.5 x 10^18 kg. Thanks! I'll try and figure it out and compare answers if you respond back!
  75. Physics 1 College Level

    If D = 3204 meters and d = 1247 meters in the figure, what is the magnitude of the force on the space ship to the nearest MN? Consider all three to be point masses. I'm not even sure to begin with this question. Any help will be much appreciated!
  76. Math

    A state lottery requires you to choose 4 cards from an ordinary deck: I heart, 1 club, 1 diamond, and 1 spade in that order from the 13 cards in each suit. If all four choices are selected by the lottery, yo win $5,000. It costs $1 to play. Find the expected payback.
  77. university

    n^2+n+1 = (n+1)^2 - n (n+1)^2 and n will always have the different parity, so the difference between them is always odd.
  78. probability

    6 male students and 3 female students sit around a round table. What is the probability that no 2 female students sit beside each other?
  79. MATH

    110% OF $8.50
  80. Calculus

    The area bounded by the curve y = 2x^2-x^3 and line y=0 is rotated around the y-axis. The volume of the resulting structure can be expressed as V = a(pi)/b, where a and b are coprime positive integers. What is the value of a + b?
  81. GEOmetry

    4455551 = 4x4x5x5x5x5x1=10000 the proof is not valid.
  82. Pre-calculus; urgent ! Please help !

    I'm taking this same class you should add me on Facebook lol Symone kaepernick
  83. math

    If Mark invests $8000 at 6% simple interest rate, how much money must he invest at an 8% simple interest rate in order for the interest on each investment to be $500. Assume that the amount of time for both investments is the same.
  84. Math

    The velocity of a body A is given by v(t) = 2t^i + t 3^j. The body starts from rest at time t = 0 and position s(0) = 2^i 10^j. At what time, t, does the body cross the X axis? What is the average velocity of the body for the time interval, t = 0 and the time that it crosses ...
  85. Dynamics

    The acceleration of a particle moving along a straight line is inversely proportional to its speed with the constant of porpotionality being k. The body starts from the position s = x0 ^i with initial speed v0. Determine the velocity of the particle as a function of time t. ...
  86. Arbor

  87. Algebra2

    Find and simplify a) f(a), b) f(a + h) and c) F(a+h) - f(a) / h ; 1. f(x) = x^2 + 5x -10
  88. Spelling 4th grade

  89. Calculus

    Can I simplify (x^.75)((200-3x)^.5)?
  90. calculus

  91. Physics

    A bullet with a mass m=12.5 g and speed v=85.4 m/s is fired into a wooden block with M=113 g which is initially at rest on a horizontal surface. The bullet is embedded into the block. The block-bullet combination slides across the surface for a distance d before stopping due ...
  92. Successive approximations

    Find all root of ln(4-x^2)=x correct to 8 decimal places. List all successive approximations.
  93. Calculus

    Graph the following function. Find and state the domain, intercepts, asymptotes, intervals of increase and decrease, local extrema, concavity, and inflections points. F(x)=(x+1)/(square root(x^2+1)) I got so far... Domain: (-infinity, infinity) Intercepts: (0,1)and(-1,0) ...
  94. Physics

    A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.2 s after being hit. Then 2.7 s after reaching its maximum height, the ball barely clears a fence that is 81.0 m from where it was hit. Assume the ground is level. (a) What maximum ...
  95. Physics

    A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.2 s after being hit. Then 2.7 s after reaching its maximum height, the ball barely clears a fence that is 81.0 m from where it was hit. Assume the ground is level. (a) What maximum ...
  96. Physics

    A train at a constant 44.0 km/h moves east for 42 min, then in a direction 45.0° east of due north for 17.0 min, and then west for 51.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of north negative) of ...
  97. Physics

    A batter hits a pitched ball when the center of the ball is 1.35 m above the ground.The ball leaves the bat at an angle of 45° with the ground. With that launch, the ball should have a horizontal range (returning to the launch level) of 106 m. (a) Does the ball clear a 8....
  98. Physics

    A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.2 s after being hit. Then 2.7 s after reaching its maximum height, the ball barely clears a fence that is 81.0 m from where it was hit. Assume the ground is level. (a) What maximum ...
  99. practical english

    Which of the following sentences contains an italicized word that's used as a predicate adjective? A. Jerry looks ILL today. B. Jerry looks INTO the microscope. C. Jerry looks disdainfully at the pile of laundry D. Jerry looks at the map. Is it c?
  100. health

    is it d
  1. Pages:
  2. 1
  3. 2
  4. 3
  5. Next>>