Answer:
First answer is 4 and the next is 120
Option 3,5 are under first expression and Option 1,2 are under second expression.
Step-by-step explanation:
1).
2).
3).
4).
5).
6).
10.5 hours
5.25 + 2.50 = 7.75. 10 - 7.75 =2.25
Answer: 14 years old and his sister is 3 years old