Melody

@@ End of Day Wrap   Sun 24/5/15   Sydney, Australia Time   12:25am  (Really mon morn) ♪ ♫

Hi everyone,

My last wrap was 3 days ago, that is because the forum was down for nearly 2 days!  

There were major database problems and the whole forum went into read only mode.

Mr Massow had the system operational again yesterday.  Three of the databases were up and running and he was working on a 4th one when quite suddenly the system shut down again.  Anyway, it is working again now except that our point scores are all over the place.  Peoples scores have been fluctuating wildly all day.  Do not get too upset, you will most likely end up with your original score or a score that you are happy with.  It is probably just a problem with the data base.

This happened last time the system had a major overhaul (about 13 months ago) It continued for quite a while before it settled down.  I thought it was admin trying to work out the best scoring system.  Anyway, eventually everyone got used to haveing a different score every 5 minutes and people started seeing the funny side of it.  You should try not to put too much importance on your score anyway.  You are here to learn and to enjoy the environment.

Our incredibly intelligent answerers over these few days have been MathsGod1, Rosala, CPhill, Radix, Baneofwizard, DarkBlaze347, Thejamesmachine, Dbg4thebest, ProxyGOd, Civonamzuk, Zacismyname and Didig.  Thanks all    

I almost forgot - Rosala has now been with us for a whole year!   Happy member day Rosala!

You are a lot of things Zegroes.   Correct mmm   I'll take it under advisement. 

it  is a division sign but it is suppose to be sideways, like this /

just type it into the calc on the home page as

300*35/100       

Because you don't want this type of special attention.   This would be your idea of a severe punishment.  I don't mind that, I like MathsGod the way he is and I like you the way you are.    Now do not respond in here or I'll clip your ear!!  

Hi Zegroes, this is a thread that I am using just to teach MathsGod1 on.  You gotta behave yourself and stay outa here. 

I think your equation solution is correct but you havwe done it the very long way :)

Before you think about what to get rid of you have to think about whether either side can be simplified.

So it is

Can i simplify the sides independently?   If so do it.

What do I want to get rid of?  How? Do it - to both sides.

Can i simplify the sides independently?   If so do it.

What do I want to get rid of?  How? Do it - to both sides.

Can i simplify the sides independently?   If so do it.

etc  etc

This is why I wanted to see if you can simplify terms properly :)

$$\begin{array}{rrlll}\\\\
2(x-3)+5x&=&4(x+2)-5\qquad&(2x-3)=2x-6\;and\;4(x+2)=4x+8\\\\
2x-6+5x&=&4x+8-5\textcolor[rgb]{0,0,1}{\;\;excellent\; start!\;}\qquad&(+5\;on\;both\;sides)\\\\
&&&\textcolor[rgb]{0,0,1}{\mbox{but now, before you start adding and subtracting things you need to simpliey each side seperately}}\\\\
2x+5x-6&=&4x+8-5\\\\
7x-6&=&4x+3&Now\; add\; 6 \;to \;both \;sides\\\\
7x-6+6&=&4x+3+6&Now\; simplify\\\\
7x&=&4x+9&Now\; subtract\;4x\;from\;each\;side\;\\\\
7x-4x&=&4x-4x+9&Now\; simplify\;\\\\
3x&=&9&Now\; divide\; both \;sides\; by\; 3\;\\\\
\frac{3x}{3}&=&\frac{9}{3}&Now\; simplify\;\\\\
x&=&3&\;\;\\
\end{array}$$

ok lets look at this

Q2) 5x*6yx=30xy     Nope 

Q3) 3(x+4)=12x    -      (3*x)+(3*4)=12x        nope 

Q4) -2(x+4)=-10x         -       (-2*x)+(-2*4)=-10x      nope

Q5) 17 - 4x -x +5=22+(-5x) (good)=22-5x     

 (like terms -x & -4x and 17 & +5) 17+5=22   /    -4x-x=-5       -4x-x=-5x   

Q6)3-4(5x-6)=23x+24           -  (Not sure but...)   (-4*5x)+(-4*-6)=-20x+24 good +    (3*5x)+(3*-6)=15x+(-18x)   15x+(-18x)-20x+24=-23x+24    now you have lost it  

Q7) 3x/2 + 4x/5 = 12x+10   No

Q8) 0.06*0.3=0.018        (6*3=18/1000=0.018 )  good

Q9) 0.06/0.2                  (6/2=3/1000=0.003)   please try to spot your own error 

Q10) 3x^2 +2x +5= 3x^2+2x+5       (Like terms none) the answer is given    great

Q11) 5x+2/6y * 9xy^2= ....Have no idea.   fair enough  

WAIT.  9xy^2 as a fraction...ah    

Can you fix any of your own errors MG ?

It is just [2nd] [atan] 

arctan is the same as inverse tan :)

I think I have interpreted it differently from CPhill

this is my interpretation