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anonymous

  • one year ago

The expression to find the perimeter of a rectangle is 2(length + width). What is the perimeter, in units, of a rectangle of length fraction 1 over 7 unit and width fraction 1 over 2 unit? fraction 1 and 1 over 7 units fraction 1 and 2 over 7 units fraction 4 over 9 unit fraction 2 over 9 unit

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  1. anonymous
    • one year ago
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    @UsukiDoll

  2. anonymous
    • one year ago
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    @UsukiDoll

  3. phi
    • one year ago
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    length is 1/7 width is 1/2 can you add those two fractions?

  4. phi
    • one year ago
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    \[ \frac{1}{7}+ \frac{1}{2} \] use 14 as the common denominator

  5. UsukiDoll
    • one year ago
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    Perimeter = 2L + 2W let l = 1/7 and w = 1/2 Perimeter =\[2(\frac{1}{7})+2(\frac{1}{2})\]

  6. anonymous
    • one year ago
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    ya

  7. UsukiDoll
    • one year ago
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    ok then multiply first.

  8. anonymous
    • one year ago
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    multiply what

  9. UsukiDoll
    • one year ago
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    2 x 1/7 + 2 x 1/2

  10. UsukiDoll
    • one year ago
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    what is 2 x 1/7 what is 2 x 1/2

  11. UsukiDoll
    • one year ago
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    |dw:1437738157402:dw|

  12. anonymous
    • one year ago
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    0.285714285714

  13. anonymous
    • one year ago
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    for the first one

  14. anonymous
    • one year ago
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    2 x 1 over 2 is 1

  15. UsukiDoll
    • one year ago
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    ok... tip: keep your result in fraction form because decimals are nasty

  16. anonymous
    • one year ago
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    i used calculator

  17. UsukiDoll
    • one year ago
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    |dw:1437738291917:dw|

  18. UsukiDoll
    • one year ago
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    not a good idea to use calculator... I know universities that ban them .

  19. UsukiDoll
    • one year ago
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    anyway we take the LCD because we have one fraction and one whole number

  20. UsukiDoll
    • one year ago
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    |dw:1437738349274:dw|

  21. anonymous
    • one year ago
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    yes

  22. UsukiDoll
    • one year ago
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    so it's just what's 2 +7 you'll get the numerator

  23. anonymous
    • one year ago
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    9

  24. UsukiDoll
    • one year ago
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    yeah so the perimeter is 9/7

  25. anonymous
    • one year ago
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    \[4\over9\]

  26. anonymous
    • one year ago
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    for the firdt one

  27. anonymous
    • one year ago
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    first

  28. UsukiDoll
    • one year ago
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    what is this?

  29. UsukiDoll
    • one year ago
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    oh ... I see your choices are in mixed fraction form . we just have to adjust 9/7 because it's improper

  30. anonymous
    • one year ago
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    yup

  31. UsukiDoll
    • one year ago
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    |dw:1437738535938:dw|

  32. UsukiDoll
    • one year ago
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    though both versions are right XD

  33. anonymous
    • one year ago
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    there is one more

  34. UsukiDoll
    • one year ago
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    open a new question XD

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