which of the following choices is the common difference between the terms of this arithmetic sequence
4x + 7y, 8x+ 2y ,12x -3y,16x-8y,20x-13y, ...
A5x+4y
B4x-5y
C-5x-4y
D5x -4y
E4x +5y
4x + 7y, 8x+ 2y ,12x -3y,16x-8y,20x-13y, ...
A5x+4y
B4x-5y
C-5x-4y
D5x -4y
E4x +5y