. Loretta and her family are going on vacation their destination is 610 miles from their home Loretta is going to share some of the driving with her dad her average speed while driving is 55 miles per hour in her dad's average speed while driving is 65 miles per hour the plan is for Loretta to drive for the first 4 hours of the trip and her dad to drive for the remainder of the trip determine the number of hours it will take her family to reach their destination