определить степень окисления и валентность N2O, NO2

Make the affirmative statements negative . Make the negative statements affirmative

1 She's wearing a brown dress today

2 He doesn't like wearning suits 

3 My dad works in Manchester every day 

4 My sister isn't going out this evening 

5 It's raining at the moment 

построить график функций y=(x^2+2x-15)/(x-3)