User contributions
- 19:12, 29 January 2016 (diff | hist) . . (0) . . 2009 AMC 12B Answer Key (current)
- 18:58, 29 January 2016 (diff | hist) . . (+667) . . 2009 AMC 12B Problems/Problem 21 (→Solution 1)
- 18:48, 29 January 2016 (diff | hist) . . (-93) . . 2009 AMC 12B Problems/Problem 21 (→Solution 1)