Posts by helper

Total # Posts: 1,943

  1. Algebra II

    Poorly worded question. Natural numbers are the counting numbers, 1,2,3,4,5..... Whole numbers are the natural numbers including zero. No fractional parts or decimals and no negative numbers. What is meant by opposite? Since counting numbers are positive, negative? but ...
  2. Physics

    See the links below under related questions. At least three of the links have answers to this almost exact question.
  3. math

    You're welcome.
  4. math

    The formula for perimeter is, P = 2w + 2 L 30 = 2w + 2L 30 = 2(w + l) 15 = w + l So, for a perimeter of 30, you want to sketch rectangles that the width and length total 15. Some possible rectangles, 14 + 1 = 15 13 + 2 = 15 12 + 3 = 15 11 + 4 = 15 10 + 5 = 15 9 + 6 = 15 8 + 7...
  5. Physics

    The first link below does have an answer. Whether it is a complete answer, I wouldn't know. You have to scroll down quite a bit for the answer. I am pasting that answer here. Maybe it will help you get started. Physics - drwls, Tuesday, March 23, 2010 at 9:48pm First you ...
  6. Physics

    See the 1st link below under Related Questions. A similar problem was answered.
  7. CP Geometry

    (sqrt(-60/5)) Break it down ((sr(-1))(sr(4))(sr(3))(sr(5)))/(sr(5)) 2i (sqrt(3))
  8. Physics

    See the 1st two links below under Related Questions. This almost exact problem was answered.
  9. math

    Lisa, I hope I didn't sound mean to you. That is not my intention. You will never learn unless you try. It takes practice. :) Is there something in particular you don't understand about dealing with fractions?
  10. math

    Tutors do not do your homework. It is obvious that you are struggling with this. The only way you will learn is practice. Try these problems YOURSELF. If you have a specific question we will be more than happy to help, but YOU must attempt these problems first.
  11. math

    And, ignore how I said that I do it. Do it your way, however you were taught. Your way IS correct. I just prefer to do it the way I was taught. I don't want to confuse you. :)
  12. math

    Ok, sorry, your answer 8 25/72, was the SUM, not the final answer, which is the average. 8 25/72 is correct for the sum. You have to divide the sum by 2, for the average. So however you were adding is correct.
  13. math

    What grade are you in? Unless there is a new way taught for adding fractions, you can't do it like that. You have to convert each mixed number to a fraction 3 2/9 = 29/9 5 1/8 = 41/8 Then you add 29/9 + 41/8 Find the LCD 232/72 + 369/72 = 601/72 601/72 divided by 2, ...
  14. math

    Not correct. Post your work so I can see what you are doing wrong, because you are not even close. :)
  15. math

    Yes, always. All fractions have to have the same denominator to add.
  16. Math

    How did you get 40 from that? Do you mean 200/(x - 1) = 200/(x + 10) cross multiply 200(x + 10) = 200(x - 1) 200x + 2000 = 200x - 200 NO solution to this
  17. Math

    Thank you. :)
  18. Math

    Please see your 1st post for an answer. And, please don't repost a question without first checking to see if your original post was answered. Please have patience. The tutors volunteer their time to help you. Sometimes it takes awhile for a post to be answered. You have ...
  19. Trig

    I apologize. The answer hadn't been posted when you posted this.
  20. Trig

    See your 1st post for the answer. And, please check your original post for an answer before reposting.
  21. general

    Thank you Kristin.
  22. math

    What is 300 + 20? Answer, 320 Is this what you need? If so, you couldn't attempt this?
  23. Math

    y = sqrt(x^2 + 2x) square both sides y^2 = x^2 + 2x x^2 + 2x = y^2 complete the square x^2 + 2x + 1 = y^2 + 1 (x + 1)^2 = y^2 + 1 take the square root of both sides + x + 1 = (sqrt(y^2 + 1)) - x - 1 = (sqrt(y^2 + 1)) x = -1 + - (sqrt(y^2 + 1)) interchange x and y y = -1 +- (...
  24. Math

    D = RT (Distance = Rate x Time) Normal Rate R = rate T = time RT = 200 Increased Rate/less time R + 10 T - 1 (R + 10)(T - 1) = 200 Solve these two equation simultaneously. (R + 10)(T - 1) = 200 RT = 200 Expand the first equation and substitute RT = 200, for RT in that ...
  25. geometry

    If you sketch this out, the ladder, up against the wall, forms right triangle. Using the Pythagorean theorem, you need to find c, the hypotenuse. c^2 = 6^2 + 18^2 Solve for c, the length of the ladder.
  26. math

    1 square inches = 0.00694444 square feet 12 sq inches = 0.08333 sq ft 1 square ft = 144 sq inches 12 inches squared = 144 sq inches you are both right
  27. math

    (h+t)^6 = (h + t)(h + t)(h + t)(h + t) (h + t)(h + t) You would have to expand and multiply it out or use the binomial theorem. Or maybe a calculator of some sorts
  28. math

    You have to try this yourself. It is the only way you will learn. I've already done at least one of these problems for you. First, find the LCD for each . Post your work if you get stuck.
  29. Math

    See 1st post.
  30. Math

    You're welcome.
  31. Math

    0.2|-8| = 1.6 0.2 * 8 = 1.6 |5|-|-7| = - 2 5 - 7 = - 2
  32. math

    3/2 / 4/5 + 1/2 * 1/2 You need parentheses. Do you mean (3/2 / 4/5 + 1/2) * 1/2 ? or 3/2 / 4/5 + (1/2 * 1/2)?
  33. math

    Duplicate post. See your 1st post.
  34. math

    8/24 + 9/24 + 1/24 = 18/24 = 3/4 (3/4)/3 = 3/4 * 1/3 = 3/12 = 1/4 Average = 1/4
  35. math

    1/3 + 3/8 + 1/24 Find the LCD. In this case, LCD = 24 8/24 + 9/24 + 1/24 = ? Take the sum and divide by 3 for the average.
  36. Math(geometry)

    Cross off 8 + 0 = 8. Can't have a side of 0.
  37. Math(geometry)

    Formula for perimeter, P = 2L + 2w 2L + 2w = 16 2(L + w)= 16 L + w = 8 You need numbers that add to 8. 8 + 0 = 8 7 + 1 = 8 6 + 2 = 8 See how many you can come up with. There might be any easier way, that I'm not thinking about. Good luck
  38. math

    1.2
  39. math

    x = the number 6x = x + 6 Solve for x
  40. math

    164/24 = 6 20/24 = 6 5/6
  41. math - algebra

    I hit 'post answer' too soon. See below. Dan, Fran, and Stan have 194 cards. Dan has 24 less than Fran, and Stan has 35 more than Fran. How many do each of them have? Let x = the number of cards that Fran has. x + x - 24 + x + 35 = 194 3x + 11 = 194 3x = 183 x = 61
  42. math - algebra

    Are you sure that this is the exact wording for this problem? Need to know info for either Dan or Stan. You posted this almost exact same problem yesterday. I pasted that post below.
  43. public finance

    Not enough info. "calculate the MTR for his labor earnings"? More than this is missing too. Mortgage interest expense, itemized deductions, etc.
  44. Pre-Algebra

    D = RT (distance = rate x time) R = rate 8R >= 420 R >= 52.5
  45. Math Algebra

    2m +3n=4 -m + 2n= 5 Multiply by 2 (-m + 2n = 5) -2m + 4n = 10 2m + 3n = 4 Add the two equation 0 + 7n = 14 7n = 14 n = 2 To find m, substitute n = 2 in 2m + 3n = 4 and solve for m I'll let you finish Check your answers when you find m
  46. geometry

    P = 2w + 2L w = width, L = length Since, this is a square, w = L P = 2w + 2w P = 4w 2011 = 4w w = 2011/4 = 502.75 A = Lw Since this is a square, w = L = 502.75 A = (502.75)(502.75) A = ? square inches
  47. Math

    correct :)
  48. Math

    Are the sides of triangle BCE, BC, BE and EC ? In rectangle ABCD, is side BC opposite to side AD? If so, AD = BC = 3 If so, since BCE is an equilateral triangle, (all three sides equal)therefore BE = BC = EC = 3. I don't have the advantage of seeing the diagram you are, so...
  49. Algebra

    Formula for perimeter P = 2w + 2L x = length (L) y = width (w) 2x + 2y <= 60
  50. Math Geometry

    A line that bisects an angle divides it into two congruent parts. A triangle = 180 degrees 2(27) + 2(34) + x = 180 x = ?
  51. Math

    Not equal. You are solving an inequality. x > 0.5
  52. Math Geometry

    A right triangle has an angle of 90 degrees. The sum of the angles in a triangle = 180 degrees. 90 + 16 + x = 180 x = ?
  53. Math

    7 + 3 = 10 coins 3/10 = fraction of nickles fraction of dimes = ?
  54. calculus

    [1/(x^2+1)] By Formula, ∫1/(1 + x^2)dx = tan^-1(x) + C
  55. physics

    See the 3rd link below under Related Questions. This almost exact problem was solved there.
  56. math

    3/2 / 7/10 /5/2 without parentheses, I will divide in order. (3/2)/(7/10) = 3/2 * 10/7 = 30/14 (30/14)/(5/2) = 30/14 * 2/5 = 60/70 = 6/7
  57. math

    6y = -8x - 18 Put the equation in slope-intercept form, by solving for y 6y = -8x - 18 Divide both sides bu 6 y = -8/6 x - 18/6 Reduce fractions y = -4/3 x - 9/3 Now, the equation is in slope-intercept form. y = mx + b, where m = slope and b = y-intercept Slope m = ? y-...
  58. math

    x = total employees .80x = 720 Solve for x.
  59. social studies

    Thank you Ms. Sue! :)
  60. social studies

    The tutors here don't have a copy of your text book. This is something YOU need to do. READ section 6 of chapter 6. I'm sure you can find 10 important facts. Try.
  61. Algebra

    Ratio = 4:3 = 4/3 4/3 = x/(2/3) Cross multiply 3x = 4 * 2/3 Can you solve for x now?
  62. math

    To find the range, put the numbers in order. Range = highest - lowest
  63. geometry

    Complementary angles = 90 degrees x = one angle 1/3 x = other angle x + 1/3 x = 90 Combine terms and solve for x. Then use the above formula to find the other angle.
  64. Math

    I said the above because you have the shaded picture to look at, I don't.
  65. Math

    See your 1st post below. I just finished your problem. Let me know if you think I understood your problem.
  66. Math

    8x^2+18x-5 (2x + 5)(4x - 1) My method or steps is trial and error. You need to find factors of 8x^2 that also add to 18x. The same for factors of 5. It takes practice. The only way you learn is by practice. Do as many problems as you can and eventually it gets easier.
  67. algebra

    You're welcome.
  68. algebra

    I assume you need to solve these equations simultaneously ? 3x + 5y = 0 2x - 5y = -9 Solving by elimination method. The object is to eliminate one of the variables, either x or y. Since you have +5y in the first equation and -5y in the second equation, you ADD the two ...
  69. Math

    If I am following your problem. The area of ONE shaded face = 64 cm^2 Since, this face is a square, the length L equals the height h. L = H Cuboid SA = 2Lw + 2Lh + 2wh Since you have the SA (surface area) of one face, and L = H, SA = 2Lh SA = 2LL (L = h) 64 = 2L^2 32 = L^2 L...
  70. math

    See your 1st post below. I worked out the almost exact problem for you. Using the below post as an example, you should be able to at least try to do this problem. Post your work if you get stuck so someone can help you.
  71. math

    You don't state if this is compounded interest. Assuming simple interest, I = PRT (interest = principal x rate x time) 9006 - 8765 = 241 interest 241 = 8765 x R x T 241 = 8765 x R x 1 241 = 8765R Solve for R, the rate of interest Multiply R x 100 = percent
  72. math in topics

    Are you sure that is ALL the info you are given? The problem doesn't state how many students? Please recheck your problem.
  73. math

    Let x = number of trip miles (x - 2) = miles greater than first 2 1.50 + 1.20(x - 2)
  74. math

    f(x)=x^2+12x+37 y = x^2 + 12x + 37 Solve for x x^2 + 12x = y - 37 Complete the square x^2 + 12x + 36 = y - 37 + 36 (x + 6)^2 = y - 1 Take the square root of both sides +- (x + 6) = (sqrt(y - 1)) x + 6 = (sqrt(y - 1)) -x - 6 = (sqrt(y - 1)) x = -6 +- (sqrt(y - 1)) Interchange x...
  75. Science

    If you go to google dot com and put in "Seals" in the search box it will bring up more info than you could possibly use. I can't post links, otherwise I would do it for you.
  76. Math

    REINY answered your earlier post and she said to try doing it yourself. She did a similar example for you to follow. I pasted her example below. Post your work if you get stuck. Math - Reiny, Tuesday, January 25, 2011 at 12:09pm slope of line through the two points = (6-2)/(3-...
  77. biology

    About what I posted above. You probably have this already. This was a response to the exact question you posted here and there. I did a google search with your question and it directed me to your? other post on that website. I didn't realize this until after I posted above...
  78. biology

    From cholesterol heart attack dot com Physiological response: "John survived because he grew collateral coronary arteries. The coronary arteries supply the heart muscle with oxygenated blood. Chronic high cholesterol results in plaque accumulating inside the coronary ...
  79. equations calculus

    This exact question was answered for you yesterday. Please check your posts for an answer before reposting. I have pasted below the answer to this post. calculus - drwls, Monday, January 24, 2011 at 11:39pm Rewrite it as an equation for y in terms of x. y - 0.5 x = y This ...
  80. Calculus

    This is calculus? h(x)= x^3-x^2+x+6 h(-8) Plug -8 in for x and do the math.
  81. Intermediate Accounting

    Your question isn't clear. Calculate what? Do you need to calculate the portion of insurance that is a current expense for the year 2011 and the portion that is a prepaid expense or prepaid asset? 4000/2 = 2000. = 1 year expense 2000./12 = monthly expense for 1 year Jan ...
  82. math in topics

    "how many new are needed on campus" ... How many new ? New what? The answers don't make sense for the question asked. Re-read your whole post for clarity.
  83. fraction

    2/3 0f 9 Multiply 2/3 x 9 = 18/3 = 6 1/6 x 12 = ?
  84. CP Geometry

    I knew if was a riddle. That's why I asked "What" ! :)thanks
  85. CP Geometry

    (sqrt5) * (sqrt15)= (sqrt75)= =(sqrt25)(sqrt3)= 5(sqrt3) What do you call it when the nurse gives you a shot you hardly feel? What?
  86. latin

    BElimicus, testanmento When you are about to have heard, so much so astounded by was, when ninil could reply, without prejudice to these things, laughing, he added. From Google translator
  87. Algebra

    This is something you will have to do. Because of formatting, it is not possible to graph here.
  88. alegebra

    5 x -4 x 6 = -120 Product means to multiply the numbers.
  89. Math

    Do you have an equation for line h? If you do, post it here. It is needed to find the equation of line f.
  90. Math

    Do you have an equation for line h? If you do, post it here. It is needed to find the equation of line g.
  91. Math

    You are welcome!
  92. Math

    Plot the point(s) on a graph to see which quadrant it is in. Or, you can memorize this. For example, Quadrant I, the points are all positive, ie, (x,y). In Quadrant II, the points would be of the form (-x,y) Quadrant III, (-x,-y) Quadrant IV, (x,-y)
  93. Pre algebra

    44 ft/sec x 60 sec = 2640 ft/min 2640 ft/min x 60 mi/hr = 158,400 ft/hr 158,400 ft/hr / 5280 ft/mi = 30 mph
  94. math

    A = Art, B = Ben In 5 years art will be twice as old as ben. A + 5 = 2(B + 5) 5 years ago art was 3 times as old as ben. A - 5 = 3(B - 5) A + 5 = 2(B + 5) A + 5 = 2B + 10 A = 2B + 5 Substitute, A = 2B + 5, in A - 5 = 3(B - 5) 2B + 5 - 5 = 3(B - 5) 2B = 3B - 15 B = 15 Ben is 15...
  95. math

    You're welcome!
  96. math

    John sets off 4 seconds after Tom does, and finishes the lap 2.5 seconds sooner than Tom does. So, John's total time will be 6.5 sec less than Tom's time. Do you understand? Also, If you solved correctly, R = 20 and T = 32.5. Remember, the problem wants each racers'...
  97. math

    RT = D T = time for Tom T - 6.5 = time for John (-4s + -2.5s) R = rate for Tom R + 5 = rate for John D = 650 RT = D RT = 650 (R + 5)(T - 6.5) = 650 Solve these equations simultaneously. Expand (R + 5)(T - 6.5) = 650 Then substitute, RT = 650 for RT in the expansion.
  98. Math

    correct :)
  99. Math

    If two non vertical lines are parallel, their slopes are equal. Can you answer now?
  100. Calculus

    I forgot the very first line, where I rewrote the integral sin^3 x/cosx dx=|(sin^2 x sin x)/cos x dx sin^3 x/cos x dx = |sin^2 x tan x dx see above
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