SOLUTION: A volley ball coach plans her daily practices to include 10 minutes of stretching, 2/3 the entire practice scrimmaging, and the remaining practice working on drills and specific sk

Question 947146: A volley ball coach plans her daily practices to include 10 minutes of stretching, 2/3 the entire practice scrimmaging, and the remaining practice working on drills and specific skills. On Wednesday, the coach planned 100 minutes of stretching and scrimmaging. How long, in hours, is the entire practice?
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
Let ST=stretching=10 min; SC=scrimmaging=2/3(Practice); DR=drills; Practice=ST+SC+DR
SC+ST=100 min
2/3(Practice)+10 min=100 min Subtract 10 min from each side.
2/3(Practice)=90 min Multiply each side by 3/2
Practice=270 min/2=135 min*(1 hr/60 min)=2.25 hr Solve and convert to hours
ANSWER Practice was 2.25 hrs on Wednesday

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