The answer would be the first choice which is d = n + 10, d = 3n. Deepak is 10 years older than Nina, so knowing this, the equation cancels out B and D. And Deepak is 3 times Nina's age, not Nina's age is three times Deepak's. It is not the other way around.
The answer to this is 756 hours. Because first you must multiply the number of miles each flight is x the miles per minute. Next you multiply that answer by the number of trips. The answer would be how many minutes, but the question asks "how many hours", and there's 60 minutes in an hour so divide that answer by 60 and that will equal 756 hours.
To divide by three you have to put it on the outside of the box.
For example:
Sophie has 6 cookies. She wants to separate them into 3 groups.
I've attached a picture for you explaining the steps. :) Let me know if you need more help!
Answer: i think its 70
Step-by-step explanation: