Select the expressions that are equivalent to18m - 12 a. 6m - 4 + 6m - 4 + 6m - 4 b. 12m + 6 - 6m - 6 c. 6(3m - 2 d. 3(6m - 4) e. 24n - 4² + 8 - 6m

A,C,D are equivalent to 18m -12 as solving each of them will give you 18m-12.

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