Melody

Thank you Angel.

And thank you for giving CPhill thumbs up too.  I don't know if he has seen your comment and 'thumb' yet but I know he will be very pleased!  

Melody.

You do inequalities exactly the same as equations EXCEPT

you have to turn the signs around if you

* swap sides

*multiply or divide by a NEGATIVE number

*Take the reciprocal of both sides (turn them upside down)

I think that about covers it.

Maybe this site will help

Good answer zegroes

Sorry Zegroes but you messed up!

$$sin^2(sin^{-1}x)\\

=[sin(sin^{-1}x)]^2\\

=x^2$$

This is because sine and inverse sine cancel each cancel each other out.

Thanks for letting me know Chris.

I/we will have to teach zegroes to give links instead of copying the whole answer.

Hi Chilledz3non,

Thanks you for your good manners.  

If you are totally happy with your answer why don't you give CPhill a thumbs up as well.  He'd really like that.

If you are not entirely happy tell us why   

ok it is a simultaneous equations question

Let the number of get well boxes be W

Let the number of thank you boxes be T

W+T=17   ==> W=17-T (1)

7T+9W=135  (2)

Now can you solve it yourself?

Sub the (1) into (2)    etc

Thank you Zegroes