Answer:
945 minutes
Step-by-step explanation:
This month: 450 minutes
Next month: 10% more
100 + 10 = 110
110% x 450 = 495
Total: 495 + 450 = 945
The twins would be 13 years old.
21+21+21+13+13 = 89
(-7.5, 3.5)
5/7