пожалуто решите в алгебре я пробка

 

 

хво2-10х+25=0 

 

 

 

 

хво2+6х+9=0

 

 

 

4хво2-12х+9=0

 

 

9хво2-24х+16=0

решите уравнение : 3810+1206:y=3877

k+12705:121=105

задача

 Сейчас расстояние между собакой и кошкой 30 м. Через сколько секунд собака догонит кошку, если скорость собаки 10м/с? а кошки 7 м /с?

найти sin4a, если ctg2a=-2

1. They listen to the news in the evening. 2. He spends all his money on books. 3. Mother wakes me up at seven o’clock in the morning. 4. Insummer we swim in the lake every day. 5. My friend teaches at the University. 6. I take a long walk every day. 7. She gets on well with her friends. 8. My parents want to buy new furniture. 9. She cuts her hair every month. 10. The old woman feels very cold. 11. Our father works in an office and comes home for lunch. 12. Our director signs many papers every day. 13. The children play all the morning and sleep in the afternoon. 14. His brothers work hard all day, and want to rest in the evening. 15. The postman bring letters three times a day . 

1. It (to awake) my interest to economics. 2. She always (to get) good marks in English. 3. My studies (to begin) at half past eight. 4. I (to think) economy is a promising field. 5. Hard work usually (to lead) to good success. 6. My working day (to last) six hours. 7. He (to speak) English quite fluently. 8. Everybody (to know) that they (to watch) TV every evening. 9. The swimming bath (to open) at 9.00 and (to close) at 18.30 every day. 10. What time (the banks / close) in Britain? 11. The sun (to rise) in the East. 12. Bad students never (to work) hard. 13. It often (to snow) in winter. 14. She (to say), she (to hear) nothing. 15. My friend (to go) there nearly every week. 

1.     Change the following word combinations using possessive case.

The address of this man, the name of his sister-in-law, the room of our parents, the wedding of Jack and Mary, the house of the Browns, the table of my elder brother Jim.