Forty-five basketball players participate in a tournament. write and solve an equation to find the number x of 3-person teams that they can form.

What is the value of r of the geometric series?

If the value of cos330°is√3/2 then find cos 165°.

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?