Answer:
84°
Step-by-step explanation:

Total time used= 15+45+30=90 mins
Initial time=7:45
final time will be 1 hr 30 mins more than initial Time
final time= 9:15 am
The one on the left is b and the one on the right is -1.
They are all eawualateral
We plug in 14 for x when we set the two equations equal to each other to prove they are equal.
So true LM congruent to MN