Yes.  We have already presented 'proof' of this.

Search forum (if function is working) and you will find.  Use google, that would be a better idea!

19*2/3 = 38 divided by 3 = 12and 2/3

bump this one up

Why is that.? 

Chris's answer was a good one. 

$$\frac{4}{6}\times5\\\\
=\frac{4}{6}\times\frac{5}{1}\\\\
=\frac{4\times5}{6\times1}\\\\
=\frac{20}{6}\\\\
=\frac{10}{3}\\\\
=3\frac{1}{3}\\\\$$

Does 9/sqrt3(10) =sqrt3(10)/10

$$\frac{9}{\sqrt3}\times 10 \\\\
=\frac{9}{\sqrt3}\times \frac{10}{1} \\\\
=\frac{90}{\sqrt3} \\\\
=\frac{90}{\sqrt3}\times \frac{\sqrt3}{\sqrt3} \\\\
=\frac{90\sqrt3}{\sqrt3\times\sqrt3} \\\\
=\frac{90\sqrt3}{3} \\\\
=30\sqrt3$$

What is the function of 1 to -6 2 to -9 3 to -12 4 to -15?

x +1, +2, +3, +4

y -6, -9, -12, -15

Okay, the first thing I notice is that the numbers are going down by 3 each time.

So there must be a -3*x in there somewhere.

-3*1=-3  if i subtract another 3 then the answer will be -6

-3*2=-6     -6-3=-9

-3*3=-9     -9-3=-12

-3*4=-12   -12-3=-15

I do believe I have it

y = -3x-3

It is important that you think about the logic that I have used. 

if f(4) then f(x)=16x-19=24

This does not make sense to me.

f(4) = 16*4-19 = 45

Some of the others are much better at 'forensic maths' than me.  Maybe one of them will have more luck with interpreting your question. 

I have just received another email form Andre.

I want to keep everybody updated so here is a copy.  

I have thanked Andre.  There are a lot of problems but Andre is working hard to sort them out for us.

--------------------------------------------------------------------------------------------------------------

Hello Melody,

Did you put that exclamation mark there Andre?  Thank you!