If the probability of an event is 1/n, what is the probabilty that the event does not occur?

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)