Giải phương trình a, √x +$\sqrt[]{x+3}$ = 5- $\sqrt[]{x²+3}$ b, √x + 2$\sqrt[]{x+3}$ = 7 - $\sqrt[]{x²+3}$

1.Do you mind if I take this book -> Would ... 2.Let's do the housework -> -> -> 3.Would you mind if I closed the door? ->Do... 4.How about going camping next week -> -> -> Viết lại câu sao cho nghĩa không đổi

Bài 1:Cho tam giác ABC vuông A,đường cao AH.Ah=2cm,ab=4cm.Tính AC,BC,HB,HC Bài 2:CHo tam giác ABC vuông A,có BC=12cm,AB=16cm.Tính tỉ số lượng giác C từ đó suy ra lượng giác góc A Bài 3:Cho góc nhọn A ,cos an pha =2/3.Tính sin an pha,tan,cot

Tính giá trị nguyên của x để Q =2.P .căn x / 3 nhận giá trị nguyên Biết P = 3/căn x + 3

Ai giải giúp mình với ai, cần gấp

A=3/1.4+5/4.9+7/9.16+9/16.25+11/25.36

Giải hộ mik vs nhen 😃 mik đag cần gấp ạ 😶

1. My cousin ________ bank manager. Chọn câu trả lời đúng (A) is a (B) makes (C) is (D) he is 2. Claude is ________. Chọn câu trả lời đúng (A) Frenchman (B) a French (C) a Frenchman (D) French man 3. She smokes ________. Chọn câu trả lời đúng (A) very heavily (B) much (C) very heavy (D) lot 4. She's talking to you. Please listen to ________. Chọn câu trả lời đúng (A) she (B) hers (C) her (D) him 5. This isn't Bob's car. ________ is a sports car. Chọn câu trả lời đúng (A) He (B) His (C) He's (D) My 6. Jack and Tom ________ go to school yesterday. Chọn câu trả lời đúng (A) doesn't (B) don't (C) didn't (D) aren't 7. Jack always ________ to his office by car. Chọn câu trả lời đúng (A) is going (B) goes (C) go (D) has gone 8. ________ tall are you? Chọn câu trả lời đúng (A) Which (B) What (C) When (D) How 9. I speak French ________ Jenny. Chọn câu trả lời đúng (A) more well that (B) better than (C) more good than (D) better as 10. Mirana remembered to phone the doctor. = > ____________________________. Chọn câu trả lời đúng (A) She remembered phoning the doctor. (B) Mirana forgot to remember to phone. (C) She didn't forget to phone the doctor. (D) She remembered that she phoned her. 11. These are my ________ three children. Chọn câu trả lời đúng (A) brother Tim's (B) Tim's brother (C) brother Tim (D) brother is Tim 12. - What would you like for your birthday? - ________ will do. Chọn câu trả lời đúng (A) Anything (B) None (C) Something (D) Somebody 13. What 's your proposal? I propose that the meeting ________ . Chọn câu trả lời đúng (A) is postponing (B) be postponed (C) to be postponed (D) postpones 14. "Here's the money I promised," he said. "I always ________ my promises." Chọn câu trả lời đúng (A) agree (B) follow (C) make (D) keep 15. The boy suffered ________ a very bad headache. Chọn câu trả lời đúng (A) of (B) from (C) by (D) at 16. Always ________ honest in whatever you do. Chọn câu trả lời đúng (A) to be (B) be (C) are (D) is 17. Did you ________ your pocketbook? Chọn câu trả lời đúng (A) lose (B) loosen (C) loose (D) miss 18. I prefer ______ soccer to watching TV. Chọn câu trả lời đúng (A) played (B) has played (C) playing (D) play 19. If you had locked the gate properly, the robbers ________ into the house. Chọn câu trả lời đúng (A) would not break (B) should not break (C) should not have break (D) would not have broken 20. Your friend speaks English very well, doesn't she? Yes, she ________ English since she was a little girl. Chọn câu trả lời đúng (A) has been speaking (B) spoken (C) used to speak (D) has to speak 21. I send ______ a letter every month. A. her B. she C. herself D. hers 22. George cooks fish for ______ every day. A. they B. them C. their D. theirs 23. Don't forget to check the electricity and gas _____ you leave for your cruise holiday. A. after B. although C. unless D. before 24. This examination is ________ than the other examination. A. more easy B. difficult C. more difficult D. more easier 25. If I come, I ________ you. A. saw B. would see C. will see D. sees 26. She ________ pleased if you came. A. would be B. would have been C. would has been D. was 27. It was _____ last night that I couldn't sleep. A. such a hot B. so a hot C. such hot D. so hot 28. They had _____ night that they couldn't sleep. A. so a bad B. such a bad C. too bad D. enough bad 29. _____his illness, Benny went to school because he had an important exam. A. although B. despite C. because of D. unless 30. Do you know the name of the artist ______ painted this portrait? A. whose B. which C. that D. whom dài quá nhỉ

Isoamyl axetat + H2O -> Isoamyl axetat + NaOH -> Đimetyl oxalat + H2O ->

giải giúp mình với hứa đánh giá 5 sao cho tam giác ABC cân tại A, trên AB lấy E, đoạn thẳng qua E song song BC cắt AC tại F: a) Chứng minh tứ giác BCFE là hình thang cân b) tính số đo các góc của tứ giác BCFE biết góc A=50 độ