Need help asap please!!

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.

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

What dimensions can créate more than one triangle ?