Melody

I hope that you are feeling better now Mellie   

Maybe it was low blood pressure ?  Dehydration would make low blood pressure worse I am guessing.

Maybe your mum will get a doctor to check you tomorrow.  It could be something else altogether. 

It is not phrased as a limiting question anon.  

And if it was it would have to be also have to be stated as "from the positive side"

Hence there is no answer.

Don't forget the brackets Eloise  

It also equals

$$x+1-\frac{3}{x-8}$$

$$\\f(tan(x))=\frac{tanx-tan^2x}{1+tan^2x}\\\\
f(tan(x))=\frac{tanx(1-tanx)}{sec^2x}\\\\
f(tan(x))=cos^2x\;tanx(1-tanx)\\\\
f(tan(x))=\frac{cos^2xsinx}{cosx}(1-tanx)\\\\
f(tan(x))=cosxsinx(1-tanx)\\\\
f(tan(x))=cosxsinx-sin^2x\\\\
f(tan(x))=sin(x)[cos(x)-sin(x)]\\\\
or\\
f(tan(x))=\frac{sin2x-2sin^2x}{2}\\\\$$

Edited:   Thanks fiora

25500(1+0.8)^10

=25500*(1+0.8)^10

Now use the calc on the home page :)

$$852852480.50=8.5285248050*10^{8}$$

$$\\ln(k)=30.17\\\\
e^{ln(k)}=e^{30.17}\\\\
k=e^{30.17}\\\\$$

In a certain string ensemble,the ratio of men to woman is 5:3.If there are total of 24 people in the ensemble,how many women are ?

This is another of my pet techniques.

9 Women

Great answer anon :)

Not quite Eloise     

2.1% of 1,500   

$$\frac{2.1}{100}*1500$$     

=2.1*15      

=31.5

You should also do a sensibleness check

1% 0f 1500 is 15

2% of 1500 is 30

2.1% must be a bit more than that