Respuesta :

Answer: -2

Step-by-step explanation:

difference is just the amount of space between the numbers, in this case the numbers may look bigger but since they are negative the common difference is -2

The given arithmetic sequence is: -5, -7, -9, ...

To find the common difference, we subtract each term from its succeeding term:

-7 - (-5) = -7 + 5 = -2

-9 - (-7) = -9 + 7 = -2

Since each subtraction results in -2, the common difference of the sequence is -2.