Sari bought 45 cards at 3 for $2: 00.he sold all cards at 5 for $5.50.what was sari profit

108

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

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2