Find the nth term of the following sequences

Question 1:

0,2,4,6,8
2n−2

Question 2:

17,9,1,-7,-15
25−8n

Question 3:

14,5,-4,-13,-22
23−9n

Question 4:

6,12,18,24,30
6n

Question 5:

39,35,31,27,23
43−4n

Question 6:

6,-4,-14,-24,-34
16−10n