Melody

2^2013 (2-1)=2^2013

(-5-11)/4=-16/4=-4  

I do not understand this question.  

mean is just another word for average.

add up all the numbers then divide by how many there are.  

I don't know question 17 sorry.

No Rosala I do not think that they will be deleted.  

Before I could categorise a thread as 'fun'  now it has gone.  It is just a category like "mathematics" or "Physics"

Now the only general one is "Off  Topic" which I don't intend to use very often because it doesn't sound very nice.   

Question 19

NOTE:    I do not know this stuff.  I am referencing this site

Good,

Lets try question 16

easterly force = 3N

Northerly force =4N

Use Pythagoras's theorem to get net force.

sqrt(9+16)=5N

Now,  F=ma

5=2*a

$$acceleration =5/2=2.5m/s^2$$

Wed 27/8/14

* 1) I thought this quadratic equation was just a little different from usual

@@ End of Day Wrap :     Tues 26/8/14        Sydney, Australia          Time 10:35pm          ♬

Hi everyone,

School is definitely on in the US.  The forum has already become much busier.  It is a very good thing that so many of you are dedicated to answering questions and to helping other students learn.  Today our answerers are TakahiroMaedo, Aliammar, Alan, Kitty<3, CPhill, AfroThundr3007730, AzizHusain, DragonSlayer554 and GoldenLeaf.   A very big thank you to each of you. 

Aliammar and AfroThundr3007730 have only just joined up.  We welcome you andhope that you enjoy the time you spend with us.  

Please keep in mind that it is impossible for me to properly look at every question and answer.  I rely on you to let me know of any particularly good or interesting posts.

Anyway, here are a few interest threads for the day:

*1) Ninja has been writing a lot of very good posts pertaining to using the web2 calculator.  I think that these need to be kept.  They are very good.   this is an example of 1