Answer:
πr²
Step-by-step explanation:
Answer:
An irrational number is a real number that can't be written as a fraction.
Ex. 
A rational number is a real number such as a whole number, fraaction, decimal, or integer.
Is it possible with only letters
Answer:
x = -3
Step-by-step explanation:
Subtract 8 from both sides to get x alone.
5 - 8 = x + 8 - 8
-3 = x