Question What is the difference of the rational expressions below?
7x
x+4
3
х
7X-3
A.
x2 + 4x
B.
7x2-3x +12
2 + 4x
C.
7x-3
4
D.
7x2-3x - 12
x² + 4x

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

The answer is -pie over 2