Melody

See here 

It is a drop down menu and only displays when the curser is over the top of the button.

(as shown in my pic)

I also use google chrome and it works just fine.

interior angle of a regular pentagon = [180(5-2)]/5 = 36*3= 108 degrees

Exterior angle = 180-108 = 72 degrees

Hi Juriemagic,

Your factorisation on the right is not correct.

the first few lines are good but

\(9x^2+1 \ne (3x+1)^2\\~\\ (3x+1)^2=9x^2+6x+1\)

Other than that little error our answers are the same I think :)

The others were equations .. this one is a subtraction.

Maybe it was meant to be an equals sign ?

I do not think this simplifies very nicely

\({3x(2x-3)-(3-2x) \over 3-2x} - {18x^3 \over 9x^3-27x^2+x-3}\\ ={-3x(3-2x)-1(3-2x) \over 3-2x} - {18x^3 \over 9x^2(x-3)+1(x-3)}\\ ={(-3x-1)(3-2x) \over 3-2x} - {18x^3 \over (9x^2+1)(x-3)}\\ ={(-3x-1)(3-2x) \over 3-2x} - {18x^3 \over (9x^2+1)(x-3)}\\ ={-(3x+1)} - {18x^3 \over (9x^2+1)(x-3)}\\ ={-(3x+1) (9x^2+1)(x-3)-18x^3 \over (9x^2+1)(x-3)}\\\)

You can expand the numerator and denominator out if you want but nothing will cancel.

I should have added that x cannot equal 3 or 3/2

Thanks Tiggsy , will do  :)

The number of fish in a river is expected do decrease 5% every year for the next 4 years. There is currently 200 fish. How many fish will be in the river after 4 years?

200*0.95^4 = 162.90125

about 163 fish after 4 years.

Thanks Tiggsy

You lost me when you halved everything. I mean when you found the square root by halving 270 etc.

Why did you do that? Why does it work? 

find the equation for predicting y from x

Your  question is not complete.