At hockey practice , Coach Taylor always set aside 80% of the total time for game play. The rest of the practice is spent on the warm up. At practice yesterday, player spent 72 minutes on gameplay. The play wants to know the total practice time.

18 mins

Step-by-step explanation:

72/0.8 = ?/.2

72*0.2 = 0.8 * ?

? = (72*0.2) / 0.8

? = 18

50

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: