đường thẳng nào sau đây có hệ số góc = √3 A: y= √6/2x+1 B:y=3/ √3x-5 C=y=2x+ √3 D=y= √3/3x+2

giải phương trình x-90/10 + x-76/12 + x-58/14 + x-36/16 + x-15/17 =15 ai giúp mk với

Để chứng minh cho nhận định :' dân ta cs một lòng ... Đến quý báu của ta' tg đã đưa ra những

Hai lớp 9A và 9B có tổng số 82 học sinh. Trong dịp tết trồng cây năm 2014,mỗi học sinh lớp 9A trồng được 3 cây, mỗi học sinh lớp 9B trồng được 4 cây nên cả hai lớp trồng đc 288 cây. Tính số học sinh mỗi lớp

Giúp em với ạ đề bài là chứng minh các đẳng thức lượng giác ( ở câu 7 số bị mất là số 4 )

Giải phương trình nghiệm nguyên: x 3 − x 2 y + 3x − 2y − 5 = 0.

Phân tích các số nguyên sau ra thừa số nguyên tố 18,12,15,45,30,22,33,129,57111,117,468,100,2004,2005

Mọi người ơi, giúp em với em gấp lắm ạ cảm ơn Thành lập những số điện thoại gồm 6 chữ số. Tính xác suất trong các trường hợp sau: a) Số điện thoại có dúng một số 2 b) Số điện thoại có các chữ số khác nhau trong đó có 2 chữ số lẽ c) Số điện thoại có các chữ số khác nhau trong đó có số 1 và số 2 d) Số điện thoại có số sau lớn hơn số trước

IV. Choose the correct answers to complete the passage. Television is one of man’s most important (1)_____ of communication. It brings pictures and sounds from around the world into millions of homes. Through television, home viewers can see and learn (2)_____ people, places and things in faraway lands. TV even takes its viewers out of this world. It brings them coverage of America’s astronauts as the astronauts explore (3)_______ space. In addition to all these things, television brings its viewers a steady stream of programmes that are (4)______ to entertain. In fact, TV providesmany (5)_____ entertainment programs than any other kind. The programmes include dramas, comedies, sports, and (6)______ pictures. 1. a. ways b. means c. ranges d. shows 2. a. at b. in c. for d. about 3. a. deep b. large c. outer d. open 4. a. happened b. designed c. composed d. guided 5. a. more b. even c. most d. hardly 6. a. lovely b. clear c. motion d. full V. Read the text then answer the questions. Television viewing is a major activity and influence on children. Children in the United States watch an average of three to four hours of television a day. While television can entertain, inform, and keep our children company, it may also influence them in undesirable ways. Time spent watching television takes away from important activities such as reading, school work, playing, exercise, family interaction, and social development. Children who watch a lot of television are likely to have lower grades in school, read fewer books, exercise less, and be overweight. Parents can help by doing the following: ♦ Don’t allow children to watch long blocks of TV. ♦ Help them choose suitable programmes. Children’s shows on public TV are appropriate, but soap operas, adult sitcoms and adult talk shows are not. ♦ Set certain periods when the television will be off. Study times are for learning, not for sitting in front of the TV doing homework. Make TV viewing an active process for child and parent! 1. How much TV do children in the United States watch on an average day? 2. What are the good effects of television on children? 3. What may be the bad effects of watching too much TV on school work? 4. Should parents let their children watch TV for a long time? 5. Which programmes are appropriate for children and which are not? VI. Use the prompts to write sentences. 1. We/ go/ skiing yesterday. 2. you/ watch/ the men’s basketball final/ TV/ last night? 3. I/ not play/ badminton/ last Sunday/ because/ I/ be/ ill. 4. Sue and her friends/ do/ yoga/ the gym/ now. 5. Last week/ we/ study/ how/ surf. It/ be/ very interesting. 6. He/ usually/ play/ football/ his friends/ Saturdays. 7. Where/ the children/ be/ yesterday morning? They/ be/ at the swimming pool. 8. His father/ teach/ him/ how/ play/ football/ a very young age. VII. Write the correct form of the words in brackets. 1. It was a very ____________ comedy. I laughed and laughed. (fun) 2. The children are very ____________ in animal programmes. (interest) 3. Discovery channel attracts millions of ____________ around the world. (view) 4. This ____________ had a large fund of jokes. (comedy) 5. Watching television can be very ____________. (educate) 6. Journalist Lai Van Sam is one of the ____________ Vietnamese television MCs. (good) 7. My brother is not very ______________. He doesn’t like playing or watching sports. (sport) 8. Pelé is a ______________ hero in Brazil. (nation)

Tính chu vi hình chữ nhật có diện tích 36cm2 và chiều rộng 6cm