When you mess up in a relationship with your girlfriend, is seven the perfect number of chances for her to give you in order to do right?

No it's 3, it's sort of  like the saying 3 strikes you're out basically after the third time you mess up there is no going back.

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8