Three friends are going on a drive that totals 85 miles. Carmen drives 2 times as many miles as Raina. Raina drives 7 more miles than kala. How many miles did each person drive ?

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.