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anonymous

  • one year ago

The area of a rectangle is 54ft^2 and the length of the rectangle is 3ft more than twice the width. find the dimensions of the angle. Length:? Width:?

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  1. anonymous
    • one year ago
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    @10115658

  2. anonymous
    • one year ago
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    sorry man i can't help you on this one

  3. anonymous
    • one year ago
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    aww really?

  4. anonymous
    • one year ago
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    Do you have any idea how to set it up?

  5. anonymous
    • one year ago
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    I honestly have no idea lol, that is why I tagged you in it, I've never done this equation before.

  6. anonymous
    • one year ago
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    maybe factor it

  7. anonymous
    • one year ago
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    I'm not sure lol

  8. anonymous
    • one year ago
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    give me a sec

  9. anonymous
    • one year ago
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    ok i figured it out

  10. anonymous
    • one year ago
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    so set up an equation for this problem

  11. anonymous
    • one year ago
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    How would I start that

  12. anonymous
    • one year ago
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    ok lets use w to represent the unknown

  13. anonymous
    • one year ago
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    so how do you find the length of a rectangle

  14. anonymous
    • one year ago
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    L=P/2 * W?

  15. anonymous
    • one year ago
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    sorry i meant to write area. How do you find the area of a rectangle

  16. anonymous
    • one year ago
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    A=wl

  17. anonymous
    • one year ago
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    correct

  18. anonymous
    • one year ago
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    so we called the width w. the question says the length is 3 feet more than twice the width. what would you have to do to W to get that?

  19. anonymous
    • one year ago
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    put it into a expression maybe?

  20. anonymous
    • one year ago
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    like a algebraic expression

  21. anonymous
    • one year ago
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    ya

  22. anonymous
    • one year ago
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    so...3xn?

  23. anonymous
    • one year ago
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    something around there

  24. anonymous
    • one year ago
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    so it says the length is twice the width

  25. anonymous
    • one year ago
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    we called width w. so we have 2w

  26. anonymous
    • one year ago
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    it also says that it's 3 feet more than that. what would you add to 2w to represent that?

  27. anonymous
    • one year ago
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    2w + ?

  28. anonymous
    • one year ago
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    2w+3?

  29. anonymous
    • one year ago
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    correct.

  30. anonymous
    • one year ago
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    2w+3=54ft^2?

  31. anonymous
    • one year ago
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    So that represents our length. What are you missing from that equation?

  32. anonymous
    • one year ago
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    remember area= L x W

  33. anonymous
    • one year ago
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    we're missing the width right?

  34. anonymous
    • one year ago
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    correct, what does the equation look like?

  35. anonymous
    • one year ago
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    is it going to be the same as the length? the 2w?

  36. anonymous
    • one year ago
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    I'm not sure :l im very slow haha, I hate math

  37. anonymous
    • one year ago
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    so we started by saying that w is the width

  38. anonymous
    • one year ago
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    we multiplied that by 2 and added 3 to represent the length

  39. anonymous
    • one year ago
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    I was going to say we are going to plug in w but there is nothing to plug in.

  40. anonymous
    • one year ago
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    54 = (2w+3)w

  41. anonymous
    • one year ago
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    I solve that right?

  42. anonymous
    • one year ago
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    ya, do you understand how i got that equation though?

  43. anonymous
    • one year ago
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    I got 54=5, and yes I understand now how you got the equation

  44. anonymous
    • one year ago
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    or 54/5

  45. anonymous
    • one year ago
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    nope

  46. anonymous
    • one year ago
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    I can't really solve it then? because you add like terms right so 2+3 is 5 and then the 54 is just there.

  47. anonymous
    • one year ago
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    multiply this out (2w+3)w

  48. anonymous
    • one year ago
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    6w

  49. anonymous
    • one year ago
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    6w^2

  50. anonymous
    • one year ago
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    nope, do you remember how to expand?

  51. anonymous
    • one year ago
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    Nope

  52. anonymous
    • one year ago
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    |dw:1433022042596:dw|

  53. anonymous
    • one year ago
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    what's w times 2w?

  54. anonymous
    • one year ago
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    3w^2?

  55. anonymous
    • one year ago
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    or 2w^2

  56. anonymous
    • one year ago
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    the only reason why I say that is because sometimes the w could be used as a 1 but I could be wrong

  57. anonymous
    • one year ago
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    it's 2w^2

  58. anonymous
    • one year ago
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    |dw:1433022177245:dw|

  59. anonymous
    • one year ago
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    now what's w times 3?

  60. anonymous
    • one year ago
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    3w

  61. anonymous
    • one year ago
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    correct, so we have 2w^2 + 3w = 54

  62. anonymous
    • one year ago
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    it looks like we have to factor this

  63. anonymous
    • one year ago
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    so move everything to one side of the equation

  64. anonymous
    • one year ago
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    Is it -6, an 9/2?

  65. anonymous
    • one year ago
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    right so is the width -6 or 9/2?

  66. anonymous
    • one year ago
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    -6?

  67. anonymous
    • one year ago
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    is it possible to have a negative width?

  68. anonymous
    • one year ago
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    nope

  69. anonymous
    • one year ago
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    So what is it?

  70. anonymous
    • one year ago
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    6?

  71. anonymous
    • one year ago
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    nope

  72. anonymous
    • one year ago
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    9/2?

  73. anonymous
    • one year ago
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    what was the other value you got

  74. anonymous
    • one year ago
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    9/2 is correct

  75. anonymous
    • one year ago
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    so the width is 9/2 and the length is -6?

  76. anonymous
    • one year ago
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    It says that the length is twice the width plus 3 more

  77. anonymous
    • one year ago
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    so what should the length be?

  78. anonymous
    • one year ago
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    12?

  79. anonymous
    • one year ago
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    ok, what's 9/2 times 12?

  80. anonymous
    • one year ago
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    54

  81. anonymous
    • one year ago
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    good job

  82. anonymous
    • one year ago
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    Thank you very much I appreciate you taking the time to work with me.

  83. anonymous
    • one year ago
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    no problem

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