vladutraileanu7599
28.10.2020 •
Mathematics
Please Answer for 25 Points!
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Ответ:
Third one
Step-by-step explanation:
y-1-5/(y+3)=[y(y+3)-1(y+3)-5]/y+3
=(y^2+3y-y-3-5)/y+3
=(y^2+2y-8)/y+3
Ответ:
Ming has to play for 15 hours to earn 500 points.
Step-by-step explanation:
1. Make an equation: 200 + 20h = 500 pts
2. 500 - 200 = 300
3. 300 / 20 = 15
h = 15 hours