Melody

Yes, I tend to agree Zegroes.    

x+y=-1

x^2+y^2+6y-x=-5

Here is a graphical solution

Squaddy, your icon is great.   

It is a pity it is too small to read on the forum but I looked in your profile  

Hi Squaddy - I am wondering what catet means too?

$${{\mathtt{10}}}^{{\mathtt{2.38}}} = {\mathtt{239.883\: \!291\: \!901\: \!949\: \!046\: \!5}}$$

Total playing time for all 30 is    30*42 = 1260 minutes

Total playing time for 25 left is  $${\mathtt{25}}{\mathtt{\,\times\,}}{\mathtt{42.8}} = {\mathtt{1\,070}}$$

Total playing time for the 5 gone is    $${\mathtt{1\,260}}{\mathtt{\,-\,}}{\mathtt{1\,070}} = {\mathtt{190}}$$

Average playing time for the 5 is      $${\frac{{\mathtt{190}}}{{\mathtt{5}}}} = {\mathtt{38}}$$     minutes

Thanks Alan, I always like these types of questions :)

Great explanation DarkBlaze347           

Welcome to the forum Squaddy   

The answer you just gave is a REALLY good one.  Thank you  :)))

You name (as an answerer) will be in my next "End of Day Wrap" post   

Hi  Cstaib45,

Thanks for answering but you need to show your working OR state how you get your answers.

You can use the calc that is buit-in to the forum.  Just press the [Calculation ...] button that is in the ribbon when you are making a post :)

I have given you thumbs up because you didn't know.   :)