Giải các phương trình sau: (Theo phương pháp giải đặt ẩn phụ; đặt \(t\) )

a/ ​​​\(6cos^2x+5sinx-7=0\)​

b/ \(3sin^22x+7cos2x-3=0\)

IV, Chia động từ trong ngoặc ở thể chủ động hoặc bị động sao cho thích hợp:

1/ Children (tell) ................. stories by authors as well as by librarians. 

2/ Regular fashion shows (now/hold) .................. all over the world. 

3/ No meetings in January (schedule) .................. for the book club. 

4/ Our ancestors, Homo sapiens, (already/populate) .................. East Africa 150,000 years ago.

5/ If this leave isn't taken in one year, it (transfer) .................. and used in the following year. 

1, How much of the school day should children spend studying (rather than doing activities like sport or drama)? 

2, Should subject like music and art be an important part of school life? Why? / Why not? 

(Trả lời ngắn giúp mik 2 câu này với!)

I, Complete the article with a, the or no article (ø). In pairs, explain your choices.

At the age of sixteen, Zeki Basan decided to give up his home comforts and live alone in (1) ________ tent. At the time, he was (2) ________ youngest student doing a two-year course at the School of Adventure Studies on the Isle of Skye in (3) ________ Scotland. (4) ________ tent was in a remote part of (5) ________ island and almost impossible to find without (6) ________ detailed directions. Every morning, he would get up at 6 a.m., wash in (7) ________ river, light (8) ________ fire and drink (9) ________ cup of tea before going to college. He had very little contact with his friends and his mother, who he only saw once a month. His love of nature had begun at an early age as he had grown up in (10) ________ Cairngorm Mountains in a very remote home. 

1, What sort of activities do children enjoy most? 
2, Why do many young children like physical activities? 
3, How have children's activities changed over the last 20 years?

(Trả lời câu hỏi theo quan điểm cá nhân của mn nhé!)