Khan/khan-exercises — Issue #12076: Algebra challenge - System calculation error?
Author: KhanBugz
Created: 2012-01-25 13:11:09+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: erik.tomasberg@gmail.com

second operation is
(-8/1 * -3/5) and it should be a positive answer (29/5) but in the solution area it is Negative 29/5.
Multiplying two negative numbers give a positive, not a negative.
I have been set back a dozen times because of the unknowable answer coming from the broken (?) calculation.

[algebra_challenge.html?seed=57&problem=show-points-and-or-graph (slope_intercept_form)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=57&problem=show-points-and-or-graph&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=57&problem=show-points-and-or-graph&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%2F5%5C%22%2C%5C%2219%2F5%5C%22%5D%22%2C465%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%5D)

[["-3/5","19/5"]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7

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