Your goal is to run a mean of 45 minutes per day for a week. For the first six days, you run 38, 40, 40, 42, 43, and 50 minutes. How many minutes must you run on the seventh day to reach your goal exactly?
Add each day, then multiply 45 by 7 (days), next subtract each day added together from 45 times 7 days. If that doesn't make any sense, then you can look over my work.
