Brentwood divided 31/5 by a number and got 41/2 what number did he divided by

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

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Can someone me with the property questions for 12 13 and 14 plz