Melody

Hi Mg,

for starters you have the slash in front of  'div' the wrong way around.

fix that and I will take another look :)

I think you also need \\ after {rll}

Plus you have (rrl } instead of {rll}

Ok this is how I wanted it to look

3x-7=2*-4

$$\begin{array}{rll}\\
3x-7&=&2*-4\\
3x-7&=&-8\\
3x-7+7&=&-8+7\\
3x&=&-1\\
\frac{3x}{3}&=&\frac{-1}{3}\\
x&=&\frac{-1}{3}\qquad or \\
x&=&-\frac{1}{3}\\
\end{array}$$

this is my coding

\begin{array}{rll}\\

3x-7&=&2*-4\\

3x-7&=&-8\\

3x-7+7&=&-8+7\\

3x&=&-1\\

\frac{3x}{3}&=&\frac{-1}{3}\\

x&=&\frac{-1}{3}\qquad or \\

x&=&-\frac{1}{3}\\

\end{array}

Here is another one to try

(y/3)+5=-9

hint: Subtract 5 from both sides, THEN multiply both sides by 3

If you want to concentrate on the maths instead of the coding you can use the maths formula display and just do it one line at the time, that will be easier  

I think you need to check your spelling.

The translator only works if you spell all the words correctly.

Dgb4thebest,   you better fix this one.  There are only 52 weeks in my year. 

Maybe if yours has 54 that means you get another 2 weeks of school   

plus there are 365 days in a year (366 in a leap year)

Plus

weekdays often refers to mon to fri so you could say there are 5 weekdays and 2 weekend days in a week.

But that is rather ambiguous I think.    

ok thanks Chris :)

What is the difference between undefined and indeterminate Chris ?

Are they interchangable terms?

divide both sides by 3.8

probably using Pythagoras's theorem.

I am sorry, I misread the question.  I thought it said the breadth was 2cm find the length.   

Anon you are correct the side length is   $$\sqrt2$$  cm  

This number might look weird but it is NOT imaginary.

It is an IRRATIONAL NUMBER that means it cannot be written exactly as a decimal or as a fraction.

So if you want to write it with digitr it will always be an approximation.

$${\sqrt{{\mathtt{2}}}} = {\mathtt{1.414\: \!213\: \!562\: \!373\: \!095}}$$ cm        This is an approximation of the side length :)

It is undefined

I think you are giving us little bits of questions and they are not making much sense :/