Answer:
We call the denominator rational.
Step-by-step explanation:
For example:

It's clear that the denominator is now a rational number, not an irrational one anymore.
Answer:
12x + 64y
Step-by-step explanation:
This is the distributed property. You need to apply it according to this question
Answer:
12×6×2+6×5×2+12×5×2= 324m^2
Answer:D
Step-by-step explanation: