Irrational, because if you simplify the root V72=6V2
It depends on your goals.
typically it's B but it could be D
Solve by substitution


Just plug in y=-x-1 into y+x=3
So we get:

Simplify that:

And since that is not true, that means this system of equations has no solutions!
The answer to that is 80 percent as a fraction is 8/10
Given:
and
.
To find:
The value of f(5).
Solution:
We have,

For
,




For
,




For
,




For
,




Therefore, the value of
is
.