актуальна ли сейчас тема "маленького человека" за повестью Гоголя "Шинель" ?

в выпуклом четырехугольнике равны между собой отрезки соединяющие между собой середины противолежащих сторон четырехугольника. найдите косинус угла между этими отрезками прошу!!! желательно с решением. СРОЧНО!!!!!!!!!!!

Найти область значения функции f(x)=2x^{2} + 8x + 1 с решением, если можно

Circle the best answer for each queslion of the dialogue
kate:Hello Bill!Did you have a good holiday?
Bill:a) yes they were happy
       b)Oh it will be great

       c)It wasn't so good
Kate:What happened?
Bill:a)Well i don't know
       b)First the room in the hotel was uncomfortable

       c)You see we had nj time

Kate:  It's not pleasant  Was there any other problems?
Bill:a)YEs it will
       b)Well it had to be
       c)The weather was bad

Kate:so what did you do?
Bill: a)We went to the swimming pool
        b)We were happy
        c)You are so kind

Bill:a) I like playing football

      B)Nor did i
      c) I PLAYED TABLE TENNIS
Kate I think you won't go there any more  will you?
Bill: a)No i was happy
        b)yes sure

        c)You are quite right
Пожалуйста,очень сильно нужно,и по быстрее)