Khan/khan-exercises — Issue #10964: Algebra challenge - can't use
Author: KhanBugz
Created: 2012-01-11 19:42:17+00:00
State: open
Labels: ie8, not-showing, xp

won't let me use markers

[algebra_challenge.html?seed=145&problem=16 (shifting_and_reflecting_functions)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=145&problem=16&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=145&problem=16&debug&activity=%5B%5D)

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