December 1, 2015

Homework Help: Math

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.

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