Help me please easy math Question. I know the answers I just need an explanation as to how to do it

Is it greater than or less than7*3_9*2

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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?