Answer:
15 and -26.
Step-by-step explanation:
9:00 to 3:45 = 6 hours 45 min
1 lesson = 55 min
6 lessons = 5 hours 30 min
5.3 + 0.25 = 5 hours 55 min
6.45 - 5.55 = 50 min
lunch = 50 min
By exterior angle property
Answer: 13/4
Step-by-step explanation:
3rd one
