Last week donnell practiced the piano 3 hours longer than marcus together marcus and donnell practiced the piano for 11 hours. for how many hours did each young man practice the piano?

A. the following events are mutually exclusive: living in california and watching american idol. true or false b. the number of patients seen by an outpatient practice is an example of a discrete random variable. true or false c.the law of large numbers states that as the number of times an event experiment is conducted increases, the likelihood of the actual probability of an event approaching the theoretical probability decreases. true or false d. measuring the time it takes for patients to enter the operating room is an example of a continuous random variable. true or false

What integer is equivalent to 9 3/2

What is the missing justification in the proof of the pythagorean identity below, sin^2x+cos^2x=1, using a right triangle?