Answer:
a = 5
Step-by-step explanation:
a/4 = 15/12
We can use cross products to solve
a* 12 = 4*15
12a = 60
Divide each side by 12
12a/12 = 60/12
a =5
Well there is 24 hours in a day so 24 - 15 = 9. So he spends 9 hours awake.
Answer:
2/6 - simplified fraction=1/3
Step-by-step explanation:
Answer: 2
Step-by-step explanation: 6 + (-4) = 6 - 4 = 2