Benny swam for 3 days. On each day, he would do 2 more laps than the previous day. He did y number of laps on the first day. What was the total number of laps he did for the 3 days? Give your answer in terms of y.
Lance exercised for a total of (8f + 90) min in a week. For the first 3 days, he exercised for 2f minutes per day. For the next 2 days, he exercised for 30 minutes per day. For how long did he exercise for the rest of the week?