What is the common difference, d, of the sequence?
9, – 8, – 25, – 42, – 59, ...

The common difference of the sequence is 17 ( you said difference so you already included the negetive sign in the front but if you didn't notice then the actually answer is -17)

Step-by-step explanation:

-17 + 9 ( well 9 or +9 is the same and so is 17 and +17) so as i was sayiing -17 + 9 = -8

-8 -17 = -25

-25 - 17 = -42

-42 - 17 = -59

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.