Hello, I just want to know what they want me to do because i don't really understand the question.
(iv) in total from the end of the nth day to the end of the 2nd day. Simplify your answer.
These are the question it asks before;
17. The training programme of a pilot requires him to fly 'circuits' of an airfeild. Each day he flies 3 more circuits than the day before. On the fifth day he flew 51 circuits.
Calculate how many circuits he flew:
(i) on the first day
(ii) in total by the end of the fifth day
(iii) in total by the end of the nth day.
I also have the answers to everything

Question

Hello, I just want to know what they want me to do because i don't really understand the question.
(iv) in total from the end of the nth day to the end of the 2nd day. Simplify your answer.
These are the question it asks before;
17. The training programme of a pilot requires him to fly 'circuits' of an airfeild. Each day he flies 3 more circuits than the day before. On the fifth day he flew 51 circuits.
Calculate how many circuits he flew:
(i) on the first day
(ii) in total by the end of the fifth day
(iii) in total by the end of the nth day.
I also have the answers to everything

anonymous · Answer

idk lol
just try ur best lol

anonymous · Answer

well thanks, but I have to say that doesn't help much!

anonymous · Answer

This is just a complicated way of writing compound interest.

anonymous · Answer

Oh, do you have the answer for (iii)? That one'll give you the formula for the rest, because it's the formula a for 'nth', or any day.

anonymous · Answer

Ok. I got the question before that fine- answer is $$\frac{ 2 }{ n }(3n +1)$$

anonymous · Answer

So thats the answer to (iii)

anonymous · Answer

When they say 2nth, do I times the whole thing by two? Because thats what I understand it to mean.

anonymous · Answer

So stick the number of days in the formula as 'n' and work it out.

anonymous · Answer

Ohhh I see

anonymous · Answer

So I would put in 2?

anonymous · Answer

sorry I was just trying to help :(

anonymous · Answer

Haha, no worries. btw, who doesnt like horses?!

anonymous · Answer

I am still not understanding what to do I am afraid.

anonymous · Answer

btw I hope no one doesn't like horses I love them I do riding actually

anonymous · Answer

Question one, 'n' is one.
Question two, 'n' is five.

anonymous · Answer

Ok, yeah. I go those answers fine.

anonymous · Answer

got* sorry

anonymous · Answer

The answer is $$\frac{ n }{ 2 }(9n+1)$$
can someone just explain how they got that please?

anonymous · Answer

i am not that sure sry... :(

anonymous · Answer

it is asking you to figure out how many flights the pilot made each day

anonymous · Answer

No I mean the last one,where it wants me to calculate how many circuits he flew in total from the end of the nth day to the end of the 2nth day it says. I am not sure how to do that

anonymous · Answer

Oh I just noticed I had a typo in the question there. It was meant to be what I said now- sorry!

anonymous · Answer

so 2nth day not 2nd day

anonymous · Answer

It tells you how many flights were done on the 5th day right?

anonymous · Answer

Yes

anonymous · Answer

14

anonymous · Answer

and it says each day was 3 flights more than the prior day.
So to figure out how many flights were done the day before what should you do, add or subtract?

anonymous · Answer

subtract the difference

anonymous · Answer

14? I read it to say that there were 51 flights on the fifth day.
So, yes. Subtract 3 from 51, and 3 from that answer to count backwards to the first day

anonymous · Answer

I...I have no clue why I typed 51 there.....

anonymous · Answer

ok, so there were 14 flights on the fifth day, still subtract by 3 for each day

anonymous · Answer

attachment

anonymous · Answer

There is all the questions directly from the textbook. I am stuck on (iv)

anonymous · Answer

Ok

anonymous · Answer

ok, n= some number like an X in algebra.
It is asking from some day to the end of the second day. So which day comes before the second day?

anonymous · Answer

first day..a

anonymous · Answer

yes, the first day. So how many were flown on the first and second day?

anonymous · Answer

so 2+ 5 = 7?

anonymous · Answer

2 on first day, 5 on 2nd

anonymous · Answer

Yes, good job

anonymous · Answer

Ok?

anonymous · Answer

ok

anonymous · Answer

No, but that isnt the answer

anonymous · Answer

Why isn't it the answer?

anonymous · Answer

Well the answer in the textbook is $$\frac{ n }{ 2 }(9n+1)$$

anonymous · Answer

give me a minute to think about that

anonymous · Answer

Did you look at the picture I sent? I am afraid I made a few mistakes when typing it out (sorry!) so that might help

anonymous · Answer

yes I did

anonymous · Answer

Ok good.

anonymous · Answer

That answer doesn't look correct for this problem. Are you sure you have the right answer for the right problem? Double check

anonymous · Answer

OK checking...

anonymous · Answer

Thats definitely the right one. Even got my mother to check :)

anonymous · Answer

The questions before those I had no problem with.

anonymous · Answer

If we look at day two and place a 2 where the n is that would indicate that there were 19 flights on the second day, and we know that isn't the case.
You will have to ask the teacher. Good luck

anonymous · Answer

Actually, I am home-schooled. I am the teacher! But no worries I will figure it out. :D Thanks  for your time! I appreciate your trying.