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The width of a rectangle is 8 cm less than its length. The perimeter of the rectangle is 52 cm. What is the width of the rectangle? A. 7 cm B. 9 cm C.15 cm D. 17cm
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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  • jamiebookeater
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freemap
  • freemap
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
`The width of a rectangle is 8 cm less than its length` if the length is L, then what is the width in terms of L?
freemap
  • freemap
W=L-8

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More answers

jim_thompson5910
  • jim_thompson5910
yes
jim_thompson5910
  • jim_thompson5910
now we use the perimeter of a rectangle formula P = 2L + 2W
jim_thompson5910
  • jim_thompson5910
replace P with 52 replace W with L-8 doing this gives 52 = 2L + 2(L-8) now solve for L
freemap
  • freemap
Would you divide
jim_thompson5910
  • jim_thompson5910
yes but not right away
freemap
  • freemap
l'm sorry but what would be L. Like the number I really don't understand
jim_thompson5910
  • jim_thompson5910
L stands for the length it's unknown at this point, but when you solve for L, you figure out what the number for the length is
jim_thompson5910
  • jim_thompson5910
example: if 2L = 10, then L = 5
freemap
  • freemap
52-2L =26
jim_thompson5910
  • jim_thompson5910
what would 2(L-8) turn into?
freemap
  • freemap
2L -8
freemap
  • freemap
2L - 16 i mean
jim_thompson5910
  • jim_thompson5910
so 52 = 2L + 2(L-8) turns into 52 = 2L + 2L-16
jim_thompson5910
  • jim_thompson5910
then you combine the 2L terms 2L+2L = 4L making 52 = 2L + 2L-16 turn into 52 = 4L-16
freemap
  • freemap
Which now you divide by by 4 now?
jim_thompson5910
  • jim_thompson5910
not yet
freemap
  • freemap
oh 16 + 52 is 68 and 68 divided by 4 is 17
jim_thompson5910
  • jim_thompson5910
yep, L = 17
freemap
  • freemap
Thanks so much much could be check my other answer i'll post again so you ca get other medal
jim_thompson5910
  • jim_thompson5910
since L = 17, the width is W = L-8 = 17-8 = 9
freemap
  • freemap
Thanks, i forgot about that part
jim_thompson5910
  • jim_thompson5910
they put that trap in

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