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help with 3 math problems please 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, ...

Aa n power =15.5−2.5n

Ba n power=15+2.5n

Ca n power=15.5+2.5n

Da 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?

Verified Answer :

MissPhiladelphia
  1. common differece, d = a2 - a1d = -8 - 9 = -17d = -25 - (-8) = -17
    2. first is solve the common differece,dd = 10.5 - 13 = -2.5so an = 15.5 - 2.5n is the answer
    3. a(x) = 440 + 65xwhere x is the number of weeksa(25) = 440 + 65(25)a(25) = $2065

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