They flowed 15 miles UP.
This is equivalent to a positive 15.
Then 9 miles DOWN.
This is equivalent to a negative 9.
Now put these two numbers together.
15-9
So, c. 15-9=6
The answer is 21, I think.
Answer:
5
Step-by-step explanation:
25, 45, 85, 245, 285
3 digit numbers must start with 2 as anything else would be more than 300
All numbers must end with 5 as that is the only odd number.