Giúp mình bài này với thank you các bạn các anh chị

làm hộ mik xonng trc 5h vs thank trc ạ

ko cần giải Ptrình: 2x^2-7x-6=0 hãy tính giá trị biểu thức:A=4X2X1^3+4X1X2^3

Cơ thể có kiểu gen nào sau đây là cơ thể đồng hợp về tất cả các cặp gen đang xét? A. Aabb B. AAbb C. aaBb D. AaBb

Giúp e câu này với Tìm điều kiện ạ

Khi khử 1,20g oxit của một kim loại, trong đó kim loại có hóa trị cao nhất,cần dùng 0,336 lít khí hidro ở đktc. Kim loại đó là kim loại nào? Giải thích

Rewrite the sentences in passive form 1. James Joyce wrote this book. 2.They deliver the post every day. 3. Birds eat seeds . 4. A storm destroyed three houses in the neighbourhood . 5. They built the school in 1956 . 6. Does she cook dinner every night ? 7. Did Nicky wash the dishes ? 8. Ben didn't steal Johnny's bag . 9. They found the missing painting . 10. Fiona takes the dog for a walk every day .

làm hộ mik phần b vs thank trc nha

I. Choose the best answer to complete these sentences. 51. Your mom has read this fairy tale for you many times, _______? A. has she B. does she C. hasn’t she D. doesn’t she 52. He seldom visits us, ________? A. does he B. doesn’t he C. has he D. hasn’t he 53. You’ve never been in London, _______? A. do you B. haven’t you C. have you D. don’t you 54. That’s Bob, ______? A. is that B. isn’t that C. is it D. isn’t it 55. No one died in the accident, ________? A. did they B. didn’t they C. do they D. don’t they 56. Nothing is wrong, ________? A. isn’t it B. is nothing C. is it D. isn’t nothing 57. I’m supposed to be here, _______? A. am I B. are you C. aren’t you D. aren’t I 58. Everything is OK, _______? A. is it B. isn’t it C. is everything D. isn’t everything 59. Everyone took a rest, ________? A. did they B. didn’t they C. do they D. don’t they 60. Going swimming in the summer is never boring, _______? A. isn’t it B. is it C. does it D. doesn’t it 61. Let’s dance together, _______? A. shall we B. do we C. don’t we D. will we 62. Don’t talk in class, ________? A. won’t we B. do we C. will we D. don’t we 63. This picture is yours, ______? A. is this B. isn’t this C. is it D. isn’t it 64. Hoa never comes to class late, ______? A. does she B. doesn’t she C. does Hoa D. doesn’t Hoa 65. He hardly makes a mistake, _______? A. has he B. hasn’t he C. does he D. doesn’t he 66. Nobody cheated in the exam, ______? A. do they B. don’t they C. did they D. didn’t they 67. This is a beautiful girl, ________? A. is this B. isn’t this C. is she D. isn’t she 68. Let’s come back home, ________? A. will you B. won’t we C. shall we D. do you 69. I am not wrong, ______? A. am I B. aren’t I C. are I D. are you 70. He never gets up early, ______? A. doesn’t he B. does he C. has he D. hasn’t he 71. They rarely go to the cinema, ______? A. have they B. haven’t they C. do they D. don’t they Cảm ơn các bạn

Bài 5 : Chứng tỏ rằng : B = 1/2^2 + 1/3^2 + 1/4^2 +1/5^2 + 1/6^2 + 1/7^2 + 1/8^2 < 1