What’s an equivalent expression to -1/3 (6m+12)

How many days was the temperature above 90 degrees?

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.

With alll of except for the 2 that i did already