What is 12 times13 without using a calculator

What are “like terms”? why can we only add like terms?

Wrote and expression for the difference of p and 4

Which question is not a good survey question? a.don't you agree that the financial crisis is essentially over? 63on average, how many hours do you sleep per day? c. what is your opinion of educational funding this year? d.are you happy with the availability of electronic products in your state?