Math study guide! these are the only problems left i need help with please!!!!!

For questions 1–6 identify each sequence as arithmetic or geometric. Then find the common difference or common ratio.

1. 13, 19, 25, 31, ...

2. 16, 24, 36, 54, ...

3. 4, 14, 24, 34, ...

4. 1, 4, 16, 64, ...

5. 35, 33, 31, 29, ...

6. 64, 48, 36, 27, ...

For questions 7–9 find the fifth term of each sequence.
7. a1=20, an=1/2an-1+2

8. an=8n-5

9. a1=1/2, an=2an-1

10. Explain how the common ratio for a geometric sequence with positive terms determines whether the terms increase or decrease. (1 point)


11. In June, you start a holiday savings account with a deposit of $50. You increase each monthly deposit by $2 until the end of the year. How much money will you deposit in December? (1 point)


PLEASE HELP i've been absent from school for being sick and i'm so lost and reallly need a 100% on this :(


please and thank you !! ill choose best answer

1) arithmetic; d=6
2) geometric; r=3/2
3) arithmetic; d=10
4) geometric; r=4
5) arithmetic; d=-2
6) geometric; r=3/4
7) 5
8) 35
9) 8
10) The terms increase if the common ratio is greater than one. The terms decrease if the common ratio is less than one.
11) $62.