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.

20 + 30 + 10 = ?

60

it hand egg

and it not soccer

it football

To find the total length of practice, we need to substitute the value of d (30 minutes) into the given expression 20 + d + 10.

So, substituting d = 30, we get:

Practice length = 20 + d + 10
Practice length = 20 + 30 + 10
Practice length = 60 minutes

Therefore, practice lasts for 60 minutes when 30 minutes are spent on practice drills.