SOLUTION: If 3, 6, 12, 2y + 6 is a geometric sequence, what is the value of y?

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Question 366489: If 3, 6, 12, 2y + 6 is a geometric sequence, what is the value of y?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Look at the differences between terms,
6-3=3
12-6=6
The next difference should be 9
%282y%2B6%29-12=9
2y-6=9
2y=15
highlight%28y=15%2F2%29