Homework Help: math

Posted by HELP ME PLSSSSSSSS on Wednesday, June 1, 2011 at 1:17am.

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.

math - Dan, Wednesday, June 1, 2011 at 1:53am
20+d+10 where d=30, 20+30+10=60minutes or 1 hour

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