emily need 45 minutes to get dressed and eat breakfast which makes the time 7:00am then needs an extra 10 minutes to walk to school, therefore she needs to wake at 6:50am
6:50. If she wakes up at 6:50, and uses 30 minutes to get dressed, the time would be 7:20. Then if she uses 15 minutes to eat, the time would be 7:35. Lastly, if she uses her 10 minutes to walk, she’d catch the bus at 7:45. I don’t know why anyone would test their luck with that time, but that’s the answer. 6:50
