Please hurry I'll give out the brain thing
Which of these expressions is equivalent to 3/6

A) 1/1 + 2/2 + 3/3

B) 1/6 + 1/6 + 1/6

C) 1/6 + 2/6 + 3/6

D) 1/2 + 1/3 + 1/6

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm