Determine if the sequence is arithmetic. If it is, find the common difference and the term
named in the problem.
9)28.48. 68. 88..
Find a

10) 24, 29, 34, 39, ...
Find a

11) 19, 9. -1. -11,
Find a,

12) -11, -3, 5, 13,
Find a

13) 13, 11. 9, 7,
Find a

14) -37. -34. -31. -28.
Find a

15) 181, 1814, 18144, 181444,
Find a

16 5, -4, -13, -22,..
Find a

17) -34, -42. -50. -58.
Find a

18)-22.-28.-34
Find a

19) -40.-38. -36, -34.
Find a

20) 37. 33, 29 25
Find a