How do I find the Domain of these functions?

y=x^2+1

And

y= 2 over x-3

R and R-3

Step-by-step explanation:

domain is all possible values on which function is defined.

in second example if we put 3 will make y undefined so we excluded from R.For all other values function is defined so domain id R-3

i'm going to search it

step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk