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anonymous

  • one year ago

The work of a student to find the dimensions of a rectangle of area 6 + 8x and width 2 is shown below: Step 1: 6 + 8x Step 2: 2(4) + 2(6x) Step 3: 2(4 + 6x) Step 4: Dimensions of the rectangle are 2 and 4 + 6x In which step did the student first make an error and what is the correct step? Step 3; 2 + (4 + 6x) Step 3; 2 + (4 ⋅ 6x) Step 2; 2(4) + 2(4x) Step 2; 2(3) + 2(4x)

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  1. anonymous
    • one year ago
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    @UsukiDoll

  2. UsukiDoll
    • one year ago
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    let me read and catch up on that for a bit.

  3. anonymous
    • one year ago
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    k

  4. anonymous
    • one year ago
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    @DeltaForce

  5. anonymous
    • one year ago
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    @DarkMoonZ

  6. anonymous
    • one year ago
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    @Donblue

  7. anonymous
    • one year ago
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    @unicwaan

  8. anonymous
    • one year ago
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    @shinebrightlikeadimon

  9. UsukiDoll
    • one year ago
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    whoa... please do not mass tag. It's a form of spam on OS and anyway A = L X W area of the rectangle = length x width

  10. anonymous
    • one year ago
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    oh sry

  11. anonymous
    • one year ago
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    do u understand the question????

  12. UsukiDoll
    • one year ago
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    so given area 6+8x width 2 6+8x =2L

  13. UsukiDoll
    • one year ago
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    hmmm... perimeter is P=2L+2W but it's not asking that..

  14. anonymous
    • one year ago
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    it wants to know where she went wrong

  15. UsukiDoll
    • one year ago
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    area -> 6+8x width -> 2 length -> ? area = width x length 6+8x=2L and supposedly to get length by itself we have to divide 2 3+4x=L

  16. UsukiDoll
    • one year ago
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    so 6+8x = 2(3+4x) ok the width is 2 and the length is 3+4x. student messed up really early.

  17. anonymous
    • one year ago
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    ya

  18. UsukiDoll
    • one year ago
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    looks like she is going backwards step 1 we have 6+8x then split these two numbers up 2(3)+2(4x) the 2 is yanked out 2(3+4x) yay! 6x+8 = 2(3+4x) 6x+8=6+8x

  19. UsukiDoll
    • one year ago
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    Step 2; 2(3) + 2(4x) <- this is the correct one. It took a while because I haven't done this in years, but with patience we got what we need ^^

  20. anonymous
    • one year ago
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    yup

  21. UsukiDoll
    • one year ago
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    an that part works because I was using A =WL 6+8x=2L and solved for L which was 3+4x=L so by looking at her work carefully I see that she did it differently by not using the formula A =L X W so she split 6 and 8 and factored out a 2 but in her original step 2 she wrote the wrong number

  22. UsukiDoll
    • one year ago
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    sorry stuck in reply mode.

  23. anonymous
    • one year ago
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    so step 2 was the wrong one

  24. UsukiDoll
    • one year ago
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    oh yeah we can prove that with ease given that A = 6x+8 and width 2 on her step 2 she had Step 2: 2(4) + 2(6x) which doesn't make sense that 8+12x which is the wrong area

  25. anonymous
    • one year ago
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    Step 2; 2(4) + 2(4x) Step 2; 2(3) + 2(4x) which one is right

  26. UsukiDoll
    • one year ago
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    ._. the second one

  27. UsukiDoll
    • one year ago
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    distribute the 2 on 2(4)+2(4x) we got the wrong number with x again 8+8x we were NOT given that

  28. UsukiDoll
    • one year ago
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    2(3) + 2(4x) that's 6+8x which is the area we were given in the first place

  29. UsukiDoll
    • one year ago
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    sorry stuck in reply mode.. don't know what's going on ^^

  30. UsukiDoll
    • one year ago
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    but recommendation to student use the formula A = L X W it's easier

  31. anonymous
    • one year ago
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    thx soo much

  32. anonymous
    • one year ago
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    i will ask more questions later will u be here

  33. anonymous
    • one year ago
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    in like 10 min

  34. UsukiDoll
    • one year ago
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    depends. It's the middle of the night where I live... yeah sure. It also depends on the question too...

  35. anonymous
    • one year ago
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    easier than this one

  36. anonymous
    • one year ago
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    where do u live???

  37. anonymous
    • one year ago
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    what country

  38. UsukiDoll
    • one year ago
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    Personal information shouldn't be discussed on OpenStudy... Code of Conduct.

  39. anonymous
    • one year ago
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    ohh sorry didnt know

  40. anonymous
    • one year ago
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    sorry, i was late to reply to this @3.14192653589

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