Mn cho mik hỏi là BA CÓ PHẢI LÀ CẠNH KỀ VS GÓC B KO

Đốt hoàn toàn 4,2 g một Este E thu được 6,16 gam CO2 và 2,52 gam H2O Công thức cấu tạo của E là

Đây là bài lớp 6 nha Chữ mình hơi xấu các bạn thông cảm.😊

tìm x : x.1+x.2+x.3+...+x.9=315

a cj giúp e với ah a) (37 – 17).(-5) + 23.(-13 – 17) b) (-57).(67 – 34) – 67.(34 – 57) c) (-4).(+125).(-25).(-6).(-8) d) (-98).(1 – 246) – 246.98

rút gọn biểu thức giúp mình nha!

I.Modal verbs: can,may,must 1.May be she will return tonight- she... Return tonight 2. Don't stand up!-you... Stand up 3. I'm sure they will finish it in a minute. They .... finish it in a minute 4.there is no need to answer the letter.you..answer thể letter 5.please do it for me- ...you do it for me 6. I'd like to see your children-...i see your children 7.i am not good at football-i....play football 8.do your homework!-you...do you homework 9.let's take a taxi-we...take taxi II.choose have to, don't have to,can,can't, should, shouldn't, 1.you....shout at the children. It frightens thêm 2.im sorry but you ...bring your dog in here. It's forbidden 3. You...have a visa before travelling to the usa. It's the law 4. You...stay in the library till eight o'clock. It's open all evening 5.i think you..think carefully before you sell the house 6.you...buy a new alarm clock. This one is broken 7.you ....wear a uniform at my new school 8.you... leave your bag open on the bus 9.we...go now or we'll be late 10.she... dance very well but she can't sing 11.you...be at the airport by five o'clock

gọi chiều dài ,rộng 1 hình chữ nhật lần lượt tỉ lệ 6:4 .tính chiều dài ,rộng bt chu vi là 40cm (bài tính chất dãy tỉ số bằng nhau)

chứng minh răng biểu thức n(2n-3)-2n(n+1) luôn chia hết cho 5 với mọi sô nguyen n

I. Fill in the gaps with correct words: My elder brother is a factory worker. Every morning, he gets (1) ........................ at 5 o'clock. He has some bread and milk for his ( 2 ) ................... and ( 3) ................. to work at 6:00. His work always starts at 7:00 and ( 4 ) .............. at 4:00 p.m . So he goes ( 5 ) ..................... very early, at about 5:00 in the afternoon. In the ( 6 ) ................, he usually stays at home and ( 7 ) ..................... television or ( 8) ...................... chess with me or his friends. He plays ( 9 ) .................. well. He goes to ( 10 ) ................... at about 10.00 p.m. II. Correct the mistakes in the following sentences: 1. Miss Linh go to the cinema with his family tonight.- > 2. They no wear a uniform at schools. - > 3. What do you sisters doing after school? - > 4. At the moment, my uncle work in Da Lat. - > 5. She likes listen to music in her free times. - > 6. How much grams of chicken do you wants ? - > 7. There aren't some oranges in these box. - > 8. How much people is there in your village? - > III. Give the correct form of verbs in the blankets 1. What ( you/ do ) ................ now ? - I ( unload ) ............ the vegetables. 2. ( Nam/ work ) ..................... in the garden at the moment ? 3. Let's ( help ) ..................... your friend, Nam. She ( do ) ................ her homework. 4. What you ( do ) ............ this summer vacation ? - We ( visit ) .............. Ha Long Bay. 5. She ( not have ) .................breakfast at 6:30 every morning.