ANSWER QUICK GIVING BRAINIEST! Please answer the following essay question in your own words with 5-7 sentences.

Is it necessary to have a common denominator when you multiply two fractions? Explain.

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

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?