Restricting Domain

[heelloo112233]

How do you restrict the domain for the following equations and then write them in function notation.
y=60.5X10^-0.04x  +29
y= 0.25x^2  -6x +90
and i would like to restrict the domain so that x = 20
Thank you

[S200]

How do you restrict the domain for the following equations and then write them in function notation.
y=60.5X10^-0.04x  +29
y= 0.25x^2  -6x +90
and i would like to restrict the domain so that x = 20
Thank you

Ok, so that does my head in to even look at. Although I don't have the answer (just yet) I implore you to try using Latex code.

You have basically written it out perfectly, but just try using the

Code: [Select]

[tex][/tex] tags...

How to use LaTex

If I copy your code in...

It stops there.

Try this.


Which I have included in these code tags.

Code: [Select]

[tex]y=60.5\times 10^ {-0.04x} +29 \\

y=0.25x^{2} -6x+90
[/tex]

Where the actual answer will be when I get it..  ;)

So, how are these lines linked? What is the actual question?.
Obviosly, the first ones range is >29, but I don't understand what you would restrict these domains from.
Both of them can be limited to [0. infinity)...

But I don't think this ramble is helping. Could you maybe post an image of the question?