Which of the following statements is true?

you must have common denominators to add or subtract fractions

you must have common denominators to multiply or divide fractions

you must always write fractions in simplest form before adding them

Which system of linear inequalities is represented by the graph? + l tv x-3y > 6 and y > 2x o x + 3y > 6 and y o x-3y > 6 and y> 2x o x + 3y > 6 and y > 2x + 4 la +

Here is another math questions. i will keep asking different questions. 4^2x=6

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)