User contributions
- 18:12, 29 January 2016 (diff | hist) . . (0) . . 2009 AMC 12B Answer Key (current)
- 17:58, 29 January 2016 (diff | hist) . . (+667) . . 2009 AMC 12B Problems/Problem 21 (→Solution 1)
- 17:48, 29 January 2016 (diff | hist) . . (-93) . . 2009 AMC 12B Problems/Problem 21 (→Solution 1)
