Question 572416
6 hours


And we have *[tex \LARGE 4 \le x+y \le 6] because the constraint says "you need at least 4 hours" but you need at most 6 hours if you go to the movies. A graph of the inequality can be accessed here:


http://www.wolframalpha.com/input/?i=4+%3C%3D+x%2By+%3C%3D+6