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  • 01-11-2018
  • Mathematics
contestada

the perimeter of th triangle shown is 32ft.
what is the value of x?
12 1/4 + 6 1/3 +x
A.13 5/12
B.13 5/7
C.14 5/12
D.14 5/7

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 01-11-2018

32 = 12 1/4 + 6 1/3 +x

get a common denominator for the fraction, 12

32 =  12 (1/4 * 3/3) + 6 1/3*4/4 + x

32 = 12 3/12 + 6 4/12 + x

add

32 = 18 7 /12 + x

subtract 18 7/ 12 from each side

32 - 18 7/12 = x

borrow from 32

31 12/12 - 18 7/12 = x

13 5/12 =x

Choice A


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