Posted by **Bella** on Tuesday, May 31, 2011 at 10:49pm.

At football practice, players do a 20-minute warm-up before starting their practice drills. After the practice drills, they do a 10-minute cool-down. The expression 20+d+10 describes the length of practice, where d is the number of minutes the practice drills last. How long, in minutes, does practice last if 30 minutes are spent on practice drills.

Thank you for helping me.

- Math -
**PsyDAG**, Wednesday, June 1, 2011 at 2:25am
20 + 30 + 10 = ?

- Math -
**Nalani**, Tuesday, February 9, 2016 at 6:52pm
60

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