To maintain her income, susan must work 50 hours each week. susan works 7 hours on monday, tuesday, and wednesday, and 8 hours on thursday. if the variable t stands for the amount of time over the rest of the week susan will have to work to meet her goal, which of the following units could apply to that variable? a. hours b. jobs c. dollars d. weeks

A. hours, since the variable is referring to the time

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