4) Avon Conference Cabrina and Debney are avon representatives who are attending a
conference in Seattle. After the conference, Cabrina drives home to Boise at an
average speed of 65 miles per hour and Debney drives home to Portland at an average
speed of 50 miles per hour. If the sum of their driving times is 11.4 hours and if the
sum of distances driven is 690 miles, determine the time each representative spent
driving home.