Кто-нибудь Найдите координаты вектора AB , если А(-3;2;0) и В(-1;5;2); 3. Будет ли четырехугольник АBCD параллелограммом, если А(4;-2;-6), В(-6;2;8), С(2;-3;9), D(12;-7;-4); 4. Нарисуйте параллелепипед ABCDA1B1C1D1 и обозначьте векторы C1D1, BA1, AD соответственно через a,b,c. Изобразите на рисунке вектор: a — c; 5. Вычислите угол между прямыми АВ и CD, если A(5;-8;-1), B(6;-8;-2), C(7;-5;-11), D(7;-7;-9)

 I have a separate room of my own, which is nice. However, I would like to make some changes there. My current room is of light green colour but I’d like it to be orange. I like warm and welcoming colours. My mum promised to change the wallpapers this year, so I hope to have my dream room soon. Another thing I’d change is the shape and size of my wardrobe. I have a huge rectangular wardrobe of dark hazel colour. Instead, I’d like to have a smaller one with oval top and city landscapes on it. I’d like to have a bunk bed in my room. At the moment I’m sleeping on a huge sofa, which occupies half of the room’s space, whereas bunk beds are more comfortable and compact. Sometimes my friend Polina visits me and wants to stay overnight. With a bunk bed it would be much easier, as she could sleep on its top bunk. In the right corner I have a small study with a desk, a chair, a computer, a lamp and some book shelves. I wouldn’t like to change anything there as it’s a very cozy corner. I do my home-works and additional projects there. Speaking of a computer, I dream of a cute pink laptop. Mine is an old desktop computer which is often slow to react. So my dream room should contain a new laptop. My parents don’t want me to keep any pets in the flat. But in my dreams I wish I could keep a small turtle and a hamster in my room. Also, a large fish-tank with colourful fishes would be nice. When I have such a perfect room, I’ll invite friends over more often.

1 тонна=1000 кг...29 т 20 кг=29020 кг                                                              4 т 960 кг=4960 кг...6 т 30 кг=6030 кг...5 т 60 кг=5060 кг                               1)29020+4960=33980 кг свёклы собрали со второго участка                        2)29020-6030=22990 кг свёклы увезли с первого участка                            3)33980-5060=28920 кг свёклы увезли со второго участка                     4)28920-22990=5930 кг=5 т 930 кг свёклы                                               ответ: с первого участка увезли свёклы меньше,чем со второго участка на 5 т 930 кг.