Answer:
;
and 
Step-by-step explanation:
Required
Select which expression equals 18

This gives:


This gives:


This gives:


This gives:


This gives:

From the above computations:
;
and
are equivalents of 18
I think the answer Is b i could be wrong it's been a while since I did middle school
Each term is found by adding 8 to the previous. First term = 4.
So anseer is C
Answer:
{31, 0, 28, -27} are integers
{2pie, 25square root 3, 3.141592653..., square root 48} are irrational numbers
{