Homework Help: Math (12th)

Posted by Lydia on Thursday, September 27, 2012 at 7:11pm.

What is the common difference in the arithmetic sequence 30, 27, 24, 21, 18, ...

Math (12th) - Ms. Sue, Thursday, September 27, 2012 at 7:18pm
Have you tried subtracting?
Math (12th) - Lydia, Thursday, September 27, 2012 at 7:20pm
Thank you. I tried that and got 3 :)
Math (12th) - Ms. Sue, Thursday, September 27, 2012 at 8:01pm
Right.
Math (12th) - joselyne, Tuesday, October 9, 2012 at 8:19pm
algebra2

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