Cho pt $x^{2}-8x+m=0$ . Tìm m để pt có 2 nghiệm $x_{1}, x_{2}$ thỏa mãn nghiệm sau $2x_{1}+3x_{2}=26$

Giúp mình giải những câu trắc nghiệm này với ạ

40 điểm Cho mạch điện như H.V. Biết R1 = 6; R2 = 30 và R3 = 15. Hiệu điện thế ở hai đầu AB là 24V a) Tính điện trở tương đương của mạch điện b) Tính cường độ dòng điện qua mỗi điện trở c) Tính hiệu điện thế ở hai đầu mỗi điện trở

I. Choose the word or phrase that best completes each sentence. Write your answer (A, B, C, or D) 3. He promised me an Oxford dictionary and to my great joy, he his word. A. stood by B. stuck at C. went back on D. held onto 5. Mary:" "I can't play tennis - I'm hopeless at it!" " Peter: ― ‖ A. As a matter of fact, I do. B. Can I take a rain check? C. Oh well, you're in good company. D. Thanks, but I don’t. 6. My mother often__ our mistakes, whereas my father is very strict and punishes us for even the slightest one. A. neglects B. overlooks C. avoids D. passes 7. There was coverage of the story on all the television channels. A. complete B. extensive C. total D. absolute

Vẽ anime / chibi Yc: Full màu + Full line Digi / Tradi Có tâm lữa nhóe :>

gelppppppppppppppppppppppppppppppppppppppp

Giúp tớ với các cậu làm bài 1 thôi cũng được huhu tớ đang càn gấp

Giúp e câu này nhanh với ạ e cần gaaps Thế nào là trạng thái cân bằng? Hãy kể ra các trường hợp mà vật ở trạng thái cân bằng?

I. Choose the word or phrase that best completes each sentence. Write your answer (A, B, C, or D) 3. He promised me an Oxford dictionary and to my great joy, he his word. A. stood by B. stuck at C. went back on D. held onto 5. Mary:" "I can't play tennis - I'm hopeless at it!" " Peter: ― ‖ A. As a matter of fact, I do. B. Can I take a rain check? C. Oh well, you're in good company. D. Thanks, but I don’t. 6. My mother often__ our mistakes, whereas my father is very strict and punishes us for even the slightest one. A. neglects B. overlooks C. avoids D. passes 7. There was coverage of the story on all the television channels. A. complete B. extensive C. total D. absolute 8. The company received complaints about the quality of its products. A. continual B. continued C. continuous D. continuing 9. have made communication faster and easier through the use of email and Internet is widely recognized. A. It is that computers B. That computers C. Computers that D. That it is computers 10. The escaped prisoner fought before he was finally overpowered. A. head over heels B. tooth and nail C. heart and soul D. foot and mouth. 11. John’s score on the test is the highest in the class; . A. he should study last night B. he should have studied last night C. he must have studied last night D. he must have to study last night 12. We insist that a meeting as soon as possible. A. be held B. hold C. were held D. will be held 13. I have just taken a Test of English as a Foreign Language or TOEFL short. A. of B. in C. on D. for 14. Whenever we plan to go for a picnic, it rains. A. continuously B. invariably C. unavoidably D. interminably 15. I know you didn’t want to upset me but I’d sooner you me the whole truth yesterday. A. tell B. told C. have told D. had told

Trong hoá hữu cơ như thế nào là no,không no?