Posted by Andy on Sunday, December 19, 2010 at 5:21pm.
The equation Ax^2 + 4y^2 = 16 represents an ellipse. Find all values of A such that its intersection with y = x has coordinates (x,y) which are integers.

11th grade math  josie, Friday, February 25, 2011 at 3:32am
what is the perimeter of the smaller triangle