Answer:
5 3/4 hours or 5 hours and 45 minutes
Explanation:
piano lesson = 1 1/2 hours or 1 hour and 30 minutes
practice at home = 2 3/4 hours or 2 hours and 45 minutes
2(piano lesson) + practice at home = total each week
2(1 1/12) + 2 3/4 = total
2 x 1.5 + 2.75 = total
3 + 2.75 = 5.75
5.75 hours each week or 5 3/4 hours