Help Please
What is the measure of ∠b?

Solution :-

Here we can see that ∠b is vertically opposite to 68° angle and we know that vertically opposite angles are equal.

So , the measure of ∠ b will also be equal to 68° .

More to know :

Alternate Interior angles are equal.Corresponding angles are equal.Sum of co - interior angles is 180° .Alternate exterior angles are equal.Measure of angle of straight line is 180°.Vertically opposite angles are equal.

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