Giúp em với. Cho em lời giải chi tiết nha

Giúp em giải chi tiết một câu này với ạ

một sân trường hình chữ nhật có chu vi 85m,chiều dài hơn chiều rộng 12,5m.người ta xây một bồn hoa hình tròn có chu vi 28,26m,phần còn lại để làm sân chơi.tính diện tích sân chơi

Câu 9: Một mol hiđrocacbon X đốt cháy cho ra 5 mol CO2, 1 mol X phản ứng với 2 mol AgNO3/NH3. Xác định CTCT của X ?

1. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions Every year thousands of children become the victims of sexual __________. A: status B: abuse C: crime D: problem 2. Mark the letter A, B, C or D on your answer sheet to indicate the meaningful sentence from the cues given No-one / kind-hearted / than / my mom. A: No-one is as kind-hearted than my mom. B: No-one isn’t more kind-hearted than my mom. C: No-one is more kind-hearted than my mom. D: No-one isn’t as kind-hearted than my mom. 3. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions The scarf is _________ in spite of being made of natural silk. A: affordably B:affordable C: affording D: afford 4. Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions A: remind B: museum C: craftsman D: attract 5. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions Conical hat making in the village has been passed ............... from generation to generation. A: over B: down C: up D: on 6. Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions “When should I leave for France?”, he wondered. A: He wondered if to leave for France. B: He wondered when I should leave for France. C: He wondered when to leave for France. D: He wondered when he leave for France. 7. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions A good night’s sleep can help you improve your _________. A: concentrate B: concentration C: concentrating D: concentrative 8. Mark the letter A, B, C or D on your answer sheet to indicate the meaningful sentence from the cues given I / look forward / make / own conical hat / Tay Ho village / Hue. A: I look forward to make my own conical hat in Tay Ho village in Hue. B: I am looking forward to make my own conical hat in Tay Ho village in Hue. C: I look forward to making my own conical hat in Tay Ho village in Hue. D: I look forward making my own conical hat in Tay Ho village in Hue. 9. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions “I feel depressed because of my test’s bad result.” – “_______________” A: Keep calm. Everything will be alright B: It’s very kind of you C: Let’s go. I can’t wait D: You did a good job 10. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions Life skills __________ at school for teenagers soon due to their necessity. A: will be taught B: will teach C: teach D: are taught 11. Mark the letter A, B, C or D on your answer sheet to indicate the meaningful sentence from the cues given He / say / he / be/ artisan / workshop / since 2010. A: He said he was an artisan of the workshop since 2010. B: He said he has been an artisan atthe workshop since 2010. C: He said was an artisan at the workshop since 2010. D: He said he had been an artisan of the workshop since 2010. 12. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions When we went to the hospital to visit him, they said he ____________ for his home. A: leaves B: has left C: had left D: left 13. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions “Would you like to join us on the trip to Van Phuc Silk Village?” - “_______________” A: No worries B: Congratulations C: Sounds great D: Well-done 14. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions _________ she is young, she is very independent. A: Despite B: in order to C: in order that D: Although 15. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions My father has been feeling much better since he _____________ smoking. A: gave up B: set up C: looked up D: turned up

giai phuong trinh sau:216/x-1 -200/x =4

nghĩa của từ : play with the stove ( ko dùng goolgle dịch nha)

Một vật có khối lượng 100g được ném thẳng đúng lên cao với vận tốc 8m/s từ độ cao 4m so với mặt đất. Lấy g = 10m/s2 a. Xác định cơ năng của vật khi vật chuyển động? b. Tìm vị trí vật để có thế năng bằng động năng? c. Xác định vận tốc của vật khi Wđ = 2Wt ? em cần gấp ạ. xin mọi người giúp đỡ

Nước nào sau đây có số dân đông thứ hai ở Đông Á hiện nay? A: Trung Quốc. B: Triều Tiên. C: Hàn Quốc. D: Nhật Bản.

Quê hương em có phải trạng ngữ ko