With 3 math problems i will upvote

1.)what is the common difference d of the sequence?

9, −8, −25, −42, −59,
enter your answer in the box.
d =

2.)which answer is the explicit rule for the sequence:
13, 10.5, 8, 5.5, 3, 0.5,

a. a n power =15.5−2.5n

b. a n power=15+2.5n

c. a n power=15.5+2.5n

d. a n power=15−2.5n

3.)haylee has $440 in her savings account. she deposits $65 in her account every week.
how much money will haylee have in her savings account after 25 weeks?