In the first picture, the girl is listening to music and from her face, we can understand that she is enjoying it.
Then, in the second picture, the boy is drawing a picture with colored pencils.
In the third, the group of kids is doing a piece of art. The boy with brown hair is drawing a picture, while a girl with black hair is doing pottery. (По картинке я не понял что делают другие)
In the last picture, the kids are playing in the band. We can see that the first boy in a yellow T-shirt is singing a song while his friends are playing on different instruments.
In the first picture, the girl is listening to music and from her face, we can understand that she is enjoying it.
Then, in the second picture, the boy is drawing a picture with colored pencils.
In the third, the group of kids is doing a piece of art. The boy with brown hair is drawing a picture, while a girl with black hair is doing pottery. (По картинке я не понял что делают другие)
In the last picture, the kids are playing in the band. We can see that the first boy in a yellow T-shirt is singing a song while his friends are playing on different instruments.
а) две точки пересечения (два корня)
b)
Объяснение:
a)
в) 
окружность R=3, O(0;0) и
б) xy=3 или
гипербола, точка симметрии (0;0)
точек пересечения графиков нет, самые близкие точки к началу кординат в точках х=у, у гиперболы
и 
у окружности
и 
г)
это две окружности: одна R=4, центр (0;0)
другая R=2 центр (0;2), точка касания (0;4) одна.
ну а графики придется рисовать по клеткам, используя циркуль и лекала для точности построения. Удачи.