Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
(1) x - 5 > y - 5 --> add 5 to both parts: \(x > y\). Sufficient.
(2) x^2> xy --> \(x(x-y)>0\) --> \(x>0\) and \(x-y>0\) --> \(x>y\) (answer YES, for example consider \(x=1\) and \(y=0\)) OR \(x<0\) and \(x-y<0\) --> \(x<y\) (answer NO, for example consider \(x=-1\) and \(y=0\)). Not sufficient.