Melody

Hi Riemann,

I have looked at the link and this certainly does look plagiarized to me as well.

I have no problem with you finding and presenting answers from elsewhere but you must give people credit for their work.

You can take credit for finding an answer,  and that is a skill in itself, but don't take producing an answer when you have not done so.

This is a very simple question.

If you know what a degree is then you can work it out for yourself.

The degree is the highest power of x.

I expect it is integer values, not integral values

\(two\;\;rational \;\;roots \;\;if\;\; \\ b^2-4ac>0\\ 49+4c>0 \\ 4c>-49 \\ c > -12.25 \)

-12+-11+ .......+0 + 1 + ....... +25 =

You can finish it

please include your working so that others can also learn.  

Thanks for pointing that out EP   

I was thinking about changing my answer but it is still the same only with a power of 9 instead of 11.

Obviously, the final answer will be different but I don't care so much about my final answers.

It is the method I am showing.

Make a list of what you have.  eg

Silk stockings, 3 pair,    must go on first      Call them S

shin guards   ....

Hiking socks  ....

you finish that.

Now make a list of all possible layers of 4 types.    Hint: There is not that many.

Now work out how many ways you can each of those.

Get back to us with what you now manage to do for yourself.

I have forgotten what many of these words mean. 

If you tell us what you already understand of the question then maybe you will be more likely to get a helpful answer.

Does it mean that you have to pay $1600 total on the 31st July 2023

But if you pay early you will pay less (because less interest is added) so if you pay it out on 30th April you will pay a discounted price.

Mmm, that sounds feasable.

So you are going to pay it out 2 years and 3 months early.  That is  11 quarter years

Interest rate per quarter = 9.9% / 4 =  2.475%  =  0.02475

\(discounted \;\;amount = $1600*(1-0.02475)^{11}\\ discounted \;\;amount = $1600*(0.97525)^{11}\\ discounted \;\;amount \approx $1600*0.759059\\ discounted \;\;amount \approx 1214.494442\\~\\ discounted \;\;amount \;\;payable \;\;is\;\; $1214.49\\\)

square root 

and you can do the rest.

Thanks for responding poptro..