anonymous
  • anonymous
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)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@UsukiDoll
UsukiDoll
  • UsukiDoll
let me read and catch up on that for a bit.
anonymous
  • anonymous
k

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More answers

anonymous
  • anonymous
@DeltaForce
anonymous
  • anonymous
@DarkMoonZ
anonymous
  • anonymous
@Donblue
anonymous
  • anonymous
@unicwaan
anonymous
  • anonymous
@shinebrightlikeadimon
UsukiDoll
  • UsukiDoll
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
anonymous
  • anonymous
oh sry
anonymous
  • anonymous
do u understand the question????
UsukiDoll
  • UsukiDoll
so given area 6+8x width 2 6+8x =2L
UsukiDoll
  • UsukiDoll
hmmm... perimeter is P=2L+2W but it's not asking that..
anonymous
  • anonymous
it wants to know where she went wrong
UsukiDoll
  • UsukiDoll
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
UsukiDoll
  • UsukiDoll
so 6+8x = 2(3+4x) ok the width is 2 and the length is 3+4x. student messed up really early.
anonymous
  • anonymous
ya
UsukiDoll
  • UsukiDoll
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
UsukiDoll
  • UsukiDoll
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 ^^
anonymous
  • anonymous
yup
UsukiDoll
  • UsukiDoll
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
UsukiDoll
  • UsukiDoll
sorry stuck in reply mode.
anonymous
  • anonymous
so step 2 was the wrong one
UsukiDoll
  • UsukiDoll
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
anonymous
  • anonymous
Step 2; 2(4) + 2(4x) Step 2; 2(3) + 2(4x) which one is right
UsukiDoll
  • UsukiDoll
._. the second one
UsukiDoll
  • UsukiDoll
distribute the 2 on 2(4)+2(4x) we got the wrong number with x again 8+8x we were NOT given that
UsukiDoll
  • UsukiDoll
2(3) + 2(4x) that's 6+8x which is the area we were given in the first place
UsukiDoll
  • UsukiDoll
sorry stuck in reply mode.. don't know what's going on ^^
UsukiDoll
  • UsukiDoll
but recommendation to student use the formula A = L X W it's easier
anonymous
  • anonymous
thx soo much
anonymous
  • anonymous
i will ask more questions later will u be here
anonymous
  • anonymous
in like 10 min
UsukiDoll
  • UsukiDoll
depends. It's the middle of the night where I live... yeah sure. It also depends on the question too...
anonymous
  • anonymous
easier than this one
anonymous
  • anonymous
where do u live???
anonymous
  • anonymous
what country
UsukiDoll
  • UsukiDoll
Personal information shouldn't be discussed on OpenStudy... Code of Conduct.
anonymous
  • anonymous
ohh sorry didnt know
anonymous
  • anonymous
sorry, i was late to reply to this @3.14192653589

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