Which of the following is an arithmetic sequence? a. 4, 1, −2, −5, … b. 2, −2, 2, −2, … c. 4, 1, 4, 7, … d. 3, 9, 81, 6561, …

Hello,

It would be A since each time it is being subtracted by 3.

Hope this helps!

May

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