Plz need full answer for hmw solve for x. z = 6 π x y

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Aline that intersects one of two parallel lines intersects the other also always sometimes never

Tan198=asin164=? how to solve this? ?