The midpoint is 1. Between A and B, there are a total of 14 marks on the number line. If you start at -6 and move up 7 marks, you will land on 1. The number 1 is in the middle of -6 and 8.
For a non-resident:
For a resident:
We want to know the number of days 
such that the two costs are equal ie 
To do this set the two costs equal to each other:
And solve for d:
The costs will be equal when a resident and a non-resident each use the beach for 12 days.
Answer:
Transitive Property of Congruency;If parallel lines have a transversal, then alternate interior angles are congruent.
The Transitive Property of Congruency:
If 2 angles are congruent to a third angle, then they are congruent to each other. So, since angles 4 and 5 are both congruent to angle 1, they are congruent to each other.
Angles 4 and 5 are alternate interior angles. Therefore, if parallel lines have a transversal, alternate interior angles are congruent.
It will take about 5 hours and 45 minutes to travel 322 miles. Hope this helps!!
