Which tag/code do you alwaysstart aweb page with

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

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.

What term makes it inconsistent y=2x - 4