Arectangle has a perimeter of 84 meters and a length of 35 meters. what is the widith

Which is an equation for the nth terms of the sequence 12,15,18,21

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.