Khan/khan-exercises — Issue #5270: Equation of a hyperbola - Answer doesn't work
Author: KhanBugz
Created: 2011-10-31 16:55:26+00:00
State: open
Labels: chrome, win7

Reporter: vpprel@gmail.com

Answer to the problem (using 4 hints!) is: 8/9 x

But entering this answer (in all variations) is not accepted as correct. I even tried copy and paste from the hint - didn't work.

The equation of the parabola is: (y+4)sq/64 - (x-8)sq/81 = 1

[equation_of_a_hyperbola.html?seed=189&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/equation_of_a_hyperbola.html?seed=189&problem=0&debug)

[["8x/9"],["(8/9)x"],["8/9 x"],[" 8/9 x"],[" 8/9x"]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2

MathJax is loaded, ready, queue length: 0