Ms. fox asked her class “is the sum of 4.2 and √2 rational or irrational? ” patrick answered that
the sum would be irrational.
state whether patrick is correct or incorrect. justify your reasoning.

Patrick is correct because √2 is irrational (It is a real number that can't be expressed as a ratio), and even if 4.2 is added, the sum still won't be able to be expressed as a ratio √2=approx. 1.41421, and √2 +4.2=approx.5.61421. The only change in the number is in the first two digits.