anonymous
  • anonymous
.Figure ABCD is a rectangle. The length of segment AE is (5x - 7) units and the length of segment EC is (2x - 1) units. What is the length of diagonal BD
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
no answeres i just want to know how to do it 8 units 6 units 12 units 10 units
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anonymous
  • anonymous
since this is a rectangle, we know the diagnols bisect each other. i.e., 5x-7 = 2x -1 solve for x here and to get the length of the diagnol, plug x into 2(2x-1). and that will be your answer.
anonymous
  • anonymous
kk thanks i will work it out but i might post it so that i can know if i am right or not

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anonymous
  • anonymous
k.. did you get x= ?
anonymous
  • anonymous
not yet hold on
anonymous
  • anonymous
yep..
anonymous
  • anonymous
i got 10 units for the answer
anonymous
  • anonymous
hmmm. what did u get for x?
anonymous
  • anonymous
3
anonymous
  • anonymous
i got x=2...
anonymous
  • anonymous
5x-7 = 2x -1 subtract 2x from both sides 5x - 2x - 7 = 2x - 2x - 1 3x - 7 = -1 add 7 to both sides 3x - 7 + 7 = -1 + 7 3x = 6 x = 2
anonymous
  • anonymous
o okay i see what i did wrong thatnks alot
anonymous
  • anonymous
yw.. :) thanks for working the problem with me...:)
anonymous
  • anonymous
np:D
anonymous
  • anonymous
:) just to be clear, length of the diagnol is 6 right?
anonymous
  • anonymous
yeppers thanks for showing me how to do it do :D

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