Jessicas family took a 3-hour-and-50-minute trip in a car. they left at 9:30 a. m. what time did Jessica's family arrive?

Kelly is three years younger than her sister. the sum of their ages is 34 years. how old is kelly and how old is her sister?

Really need on these. i have no idea what to do

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%