Any time a zero is in the denominator of a fraction we call that expression undefined? how would you explain why dividing by zero doesn’t result in a number?

Pls! does anybody know a shortcut for answering these types of questions in the future?

Identify the number 127 as a rational or irrational. explain

Nicole purchased a container of cashews that weighs 5 kilograms. zion purchased a container of cashews that weighs 4,900 grams. how many more grams of cashews did nicole purchase?