The function f(x) is shown on the graph. If f(x) = 0, what is x?
18fy
15-
O O only
O 6 only
O-2, 1, or 3 only
0 -6, -2, 1, or 3 only
12-
fixy
9-
6
3-
-3
+
-1
X
-3-
-6
712
-15+
-187

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