Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Kathatesmath94

can someone check my work??

  • one year ago
  • one year ago

  • This Question is Closed
  1. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    sqrt3(sqrt6+sqrt3)+(sqrt8-5)

    • one year ago
  2. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1354245450082:dw|

    • one year ago
  3. Lime
    Best Response
    You've already chosen the best response.
    Medals 0

    I believe it is much easier to use a calculator for Square root, but let's break it down. \[3 + 3 \sqrt2 +(\sqrt 8 - 5)\]

    • one year ago
  4. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    well from there i got 3+3sqrt2= 6sqrt2 + sqrt8-5

    • one year ago
  5. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    and the sqrt of 8 is 4 and sqrt of 4 is 2 so it will be 6sqrt2+sqrt2-5

    • one year ago
  6. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    whoah where did that come from

    • one year ago
  7. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1354246002329:dw|

    • one year ago
  8. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    ohh i see i took the sqaure root of 8 wrong

    • one year ago
  9. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    can i ask ya'll another question??

    • one year ago
  10. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    yep.

    • one year ago
  11. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    Part 1: Find the perimeter of a rectangular object which has a length of sqrt 128 feet and a width of sqrt 200 feet. Part 2: Explain, in complete sentences, how you arrived at the answer and give the final solution in simplified radical form. Part 3: What type of object in your home or school might this be? i am not going to lie I don't even know where to start....

    • one year ago
  12. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1354246494891:dw| Just add up the sides, for part one. Simplify the square roots a little.

    • one year ago
  13. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    sqrt of 128= 8sqrt 2?

    • one year ago
  14. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    That's right.

    • one year ago
  15. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    and the sqrt of 200 = 10sqrt 2???

    • one year ago
  16. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    yep.

    • one year ago
  17. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    what do I do from there?

    • one year ago
  18. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    do I add them together?

    • one year ago
  19. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    perimeter of a rectangle.

    • one year ago
  20. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    how do i do that?

    • one year ago
  21. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    You want to know how long the edge is... |dw:1354247036064:dw|

    • one year ago
  22. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    so multiply 8sqrt2*8sqrt2 and 10sqrt2*10sqrt2? and then add them together?

    • one year ago
  23. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    are you still there?

    • one year ago
  24. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    am I still doing this right? hello?

    • one year ago
  25. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    Yeah to find the perimeter of a rectangle, you add the lengths of all sides together.

    • one year ago
  26. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    after you multiply?

    • one year ago
  27. scarydoor
    Best Response
    You've already chosen the best response.
    Medals 1

    Just take the lengths of the sides and add them together.

    • one year ago
  28. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    so 8sqrt2*8sqrt2=64sqrt2 10sqrt2*10sqrt2= 100sqrt 2 64sqrt2+100sqrt2= 164sqrt2?

    • one year ago
  29. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    am i right so far?

    • one year ago
  30. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    was I just suppose to add them all together or multiply? like i did above?

    • one year ago
  31. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1354248044017:dw|

    • one year ago
  32. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1354248083431:dw|

    • one year ago
  33. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1354248126981:dw| Perimeter = Sum of all sides P = s1 + s2 + s3 + s4 P = 8*sqrt(2) + 10*sqrt(2) + 8*sqrt(2) + 10*sqrt(2) P = 36*sqrt(2)

    • one year ago
  34. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    So the perimeter is \[\Large 36\sqrt{2}\]

    • one year ago
  35. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    oh so I was suppose to add them not multiply

    • one year ago
  36. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    yes, or you can add the length and width and multiply by 2 this is because P = L + W + L + W P = 2L + 2W P = 2*(L + W)

    • one year ago
  37. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    oh ok that what i was thinking of

    • one year ago
  38. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    Explain, in complete sentences, how you arrived at the answer and give the final solution in simplified radical form you essentially simplify both sqrt(128) and sqrt(200) to get 8*sqrt(2) and 10*sqrt(2) you can either add up the four sides or you can add up the length and width and multiply by 2 either way, you get the answer of \[\Large 36\sqrt{2}\]

    • one year ago
  39. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    ok thats what i wrote so far what is the next step?

    • one year ago
  40. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    What type of object in your home or school might this be? \[\Large 36\sqrt{2} \approx 36(1.41421356)\] \[\Large 36\sqrt{2} \approx 50.91168816\] so the perimeter is roughly 50.91168816 feet

    • one year ago
  41. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\Large 8\sqrt{2} \approx 8(1.41421356)\] \[\Large 8\sqrt{2} \approx 11.31370848\] the width is roughly 11.31370848 feet

    • one year ago
  42. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    the funny equal sign is a approximate sign right?

    • one year ago
  43. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\Large 10\sqrt{2} \approx 10(1.41421356)\] \[\Large 10\sqrt{2} \approx 14.1421356\] the length is roughly 14.1421356 feet

    • one year ago
  44. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    so you just have to name an object that's roughly 14.1421356 ft by 11.31370848 ft

    • one year ago
  45. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    so it could be a pool right? for the object?

    • one year ago
  46. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah or a large table/counter of some sort

    • one year ago
  47. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    ohhh wow that wasnt too bad there is another one very similiar and if I post all my work will you tell me if I am right or not?

    • one year ago
  48. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    sure go for it

    • one year ago
  49. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    awesome that way I know I really understand it

    • one year ago
  50. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    Part 1: Find the area of a rectangular object which has a length of 4sqrt2 inches and a width of 6sqrt6 inches. Part 2: Explain, in complete sentences, how you arrived at the simplified answer and give the final solution in simplified radical form. Part 3: What type of object in your home or school might this be? |dw:1354248883689:dw|

    • one year ago
  51. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    ok it's a bit different because they want the area this time

    • one year ago
  52. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    and not the perimeter

    • one year ago
  53. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    isn't area multiplying the sides together?

    • one year ago
  54. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    exactly

    • one year ago
  55. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    Area = Length times Width

    • one year ago
  56. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so first i have to simplify the sqrts 6sqrt 6 = 6+3sqrt2?

    • one year ago
  57. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    9sqrt 2?

    • one year ago
  58. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    how are you getting 6sqrt 6 = 6+3sqrt2

    • one year ago
  59. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    uhhh i might of factored wrong because i took the factors 2 and 3 and pulled the 3 out to add to the 6 and left the 2 inside the radical

    • one year ago
  60. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    you can't do that

    • one year ago
  61. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    6*sqrt(6) is as simple as it gets

    • one year ago
  62. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    i was trying to make it so both of my radicals have the same square root thing of sqrt2

    • one year ago
  63. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    notice that 6 has no factors that are perfect squares (ignore 1)

    • one year ago
  64. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    so sqrt(6) can't be simplified

    • one year ago
  65. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    oh..... i was wondering how that worked cause nothing times itself equals 6

    • one year ago
  66. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    Multiply the coefficients: 6*4 = 24 Multiply the radicands: 6*2 = 12

    • one year ago
  67. Ammarah
    Best Response
    You've already chosen the best response.
    Medals 0

    what is ur question, i mean what r u trying to find exactly?

    • one year ago
  68. Ammarah
    Best Response
    You've already chosen the best response.
    Medals 0

    so u multiply and then plugg it back in to the equation.

    • one year ago
  69. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    so 6*sqrt(6) times 4*sqrt(2) = 24*sqrt(12) simplify 24*sqrt(12)

    • one year ago
  70. Ammarah
    Best Response
    You've already chosen the best response.
    Medals 0

    yes dont forget!! Simplify!

    • one year ago
  71. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    so I can go straight to part 2 right? and find the area?

    • one year ago
  72. Ammarah
    Best Response
    You've already chosen the best response.
    Medals 0

    yes.

    • one year ago
  73. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry idk why that post just showed up i have a major delay

    • one year ago
  74. Ammarah
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

    • one year ago
  75. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    yes since you can't simplify the length/width just multiply them out

    • one year ago
  76. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    now is 24sqrt12 the radical area that needs to be converted into the approximate length?

    • one year ago
  77. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    simplify that 24*sqrt(12) 24*sqrt(4*3) 24*sqrt(4)*sqrt(3) 24*2*sqrt(3) 48*sqrt(3)

    • one year ago
  78. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    and do you get the approximate length by putting the number in the calculator? i meant to ask you how you did that last time

    • one year ago
  79. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    so the area is 48*sqrt(3) square inches

    • one year ago
  80. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    you just type 6*sqrt(6) and you get 14.6969 roughly

    • one year ago
  81. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    and 4sqqrt of 2 is approximately 5.65685424949238

    • one year ago
  82. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    correct

    • one year ago
  83. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    so the object could be like a table? o ra whiite board maybe?

    • one year ago
  84. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah that's a reasonably sized whiteboard

    • one year ago
  85. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    you have helped me so much and thank you for helping me with this someone was helping me but they left and I didnt know where to go from there you are definitley a life SAVER!

    • one year ago
  86. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 1

    i'm glad i did and hopefully it's all making sense now

    • one year ago
  87. Kathatesmath94
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah they were a little different but there steps were very similar and I took notes while we talked so hopefully that will help me if I have a problem like this later on in the course

    • one year ago
  88. danielcvalencia
    Best Response
    You've already chosen the best response.
    Medals 0

    youre WELCOME

    • one year ago
  89. Ammarah
    Best Response
    You've already chosen the best response.
    Medals 0

    no thanks

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.