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Cứu mình cần lời giải rõ hơn ạ.

Cho biểu thức: A = (-a - b + c) – (-a – b – c) a) Rút gọn A b) Tính giá trị của A khi a = 1; b = -1; c = -2

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Làm giúp mình với Mình cần làm hết

[-1/3] ³ bằng mấy [-3/2] ² bằng mấy

tìm luận cứ của bài văn đức tinhs giản dị của Bác Hồ

Giải giúp mình bài này với, bài này mình không giải được Bài 1 : tìm số nguyên x thỏa mãn : a, -4 chia hết cho (x - 5) b, (x - 3) chia hết cho (x + 1) c, (2x - 6) chia hết cho (2x + 2) d, (2x - 3) chia hết cho (x + 1) e, (8x + 3) chia hết cho (2x + 3)

1. Your test must ………………..carefully. A. do B. be done C. is done D. done 2. Many people go to my village on the weekends to have a rest after …………………. A. hard working week B. a working hard week C. a hard working week D. a hard week working 3. There is a big old banyan tree at the ……………… to the village. A. door B. gate C. chance D. entrance 4. Liz wishes she ……………… Ba's village again someday. A. can visit B. could visit C. visited D. visits 5. I had ………………..to the countryside last month. A. a two-day trip B. a two-days trip C. two-day trip D. two-days trip 6. Liz took a lot of photos ………………… the trip to her parents. A. show B. showing C. to show D. showed 7. He has learnt Japanese …………………..he was a young boy. A. since B. for C. with D. when 8. What do people do …………..a living in your village?_ They plant rice and vegetables. A. to B. with C. for D. of 9. There is a river flowing ……………………my village. A. across B. crossing C. into D. through 10. The bus stopped at a/an ………………..to get some more fuel. A. airport B. pond C. store D. gas station 11. My friends and I usually play soccer……………………..Sunday afternoon. A. on B. into C. at D. for 12. She asked me how I ………………………English in the future. A. use B. would use C. can use D. have used 13. I … .most of my time wandering because I don’t know which website is useful for me. A. spend B. take C. use D. consume 14. You ………………….do a lot of exercise if you want to lose weight. A. have to B. could C. would D. all are correct 15. We have English lesson with Mr. John today, …………………? A. don’t we B. haven’t we C. have we D. do we 16. It was raining hard, ………………………my family didn’t go to the movies. A. since B. but C. because D. so 17. He left the company for a ………………………..of reasons. A. vary B. various C. variety D. all are correct 18. ……………………..do you go to school? _ I go by bike. A. What B. When C. How long D. How 19. Ba's village lies near the foot of a mountain and ………………. the river. A. by B. at C. next D. to 20. Choose the word that is CLOSEST in meaning to the underlined word of the following sentence. One of the benefits of the job is the high salary you receive. A. advantages B. disadvantages C. limits D. limitations.

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