Là 80 nhé
80 nha
giúp mk đề hai với no sao chép
1. Một vật khối lượng m = 300g, đang chuyển động với vận tốc v= 36km/h. Tính động lượng của vật đó
Bài 1:Thu gọn biểu thức sau: a)(a+b+c-d)-(a-b+c-d) b)(-a+b-c+d)+(c+d)-(-b+c) c)-(a-b-d)+(b-c+d)-(-c+b+d) d)a-{(a-3)-[(a+3)-(-a-2)]} e)a+{(a+3)-[(a+3)-(-a-2)]} h)-{-(a+b)-[(a-b)-(a+b)]} Bài 28.Chứng minh đẳng thức sau: 1.-(-a+b+c)+(b+c-1)=(b-c+6)-(7-a+b)+c 2.(-a+b-c+d)+(c+d)-(-b+c) 3.-(a-b-d)+(b-c+d)-(-c+b+d) 4.a-{(a+3)-[(a+3)-(-a-2)]} 5.a+{(a+3)-[(a+2)-(a-2)]} 6.-{-(a+b)-[-(a-b)-(a+b)]} giải hộ mink bài này làm đúng mink vote 5* cho
Tính diện tích hình thang vuông có hai đáy là 12cm,6cm và chiều cao là 6cm
1. We should be firm…………patient in this case. A. and B. or C. in stead of D. rather 2. …… food we eat lacks minerals, then the body an use the stores from its bones for more urgent needs. A. As the B. If the C. The D. Since 3. It sounds like something wrong with the car's engine…………, we'd better take it to the garage immediately. A. Otherwise B. Without it C. If not D. If so 4. We didn't go to Paris. We went to Rome………… A. also B. but also C. instead D. instead of 5. No one …………Kathy knows very much about it. A. and B. as C. but D. however 6. Some birds, …………robins and cardinals, spend their winter in the North. A. as B. such as C. and D. likely 7. Galaxies are composed of millions of individual stars…………are so far away that they appear as single pints of light. A. but they B. they C. in spite of D. contrary 8. Internet is a very fast…………convenient way for us to get information. A. and B. or C. therefore D. but 9. It's raining, …………I can't go to the beach. A. so B. or C. but D. and 10. An effective paragraph must …………be unified and ordered but also complete. A. in addition B. either C. not only D. as well 11. …………his poor English, he managed to communicate his problem very clearly. A. Although B. Even though C. though D. In spite of 12. He is saving…………he can go on vacation. A. so that B. so C. unless D. that 13. The flight was canceled…………the weather conditions were bad. A. because of B. due to the fact that C. thanks D. that 14. Pheasants spend most of their time on the ground, …………many species perch in trees at night. A. as well as B. in spite of C. because D. although 15. Natural fiber comes from…………animal or plant. A. either B. otherwise C. or D. thus 16. …………Marge, three couples are invited A. Addition B. Besides C. Next D. Moreover 17. All of the students…………the seniors will receive their grades in two weeks. A. but B. except C. and D. A or B 18. It was still painful, …………I went to see a doctor. A. but B. or C. so D. however 19. …………pipelines are expensive to build, they are relatively cheap to operate and maintain. A. Because B. That C. Although D. Despite 20. He felt ill…………he went to bed early. A. and B. but C. or D. so
Bài 1 : Tính hoá trị của mỗi ngtố trong CTHH của mỗi hợp chất sau biết nhóm (NO3) hoá trị I và nhóm CO3 hoá trị II Ba( NO3)2 , Fe(NO3)3 , CaCO3 , Li2CO3
Bieu do cho biet ti le xep loai hoc luc cua hoc sinh khoi lop 5 truong thieu hoc thang loi la: Trung binh 15%. Gioi 25 %. Tinh so hoc sinh moi loai, biet so hoc sinh xep loai hoc luc kha la 120 hoc sinh.
Mn giúp mình nha mình sẽ vote 5* :)
Phan tich da thuc thanh nhan tu
Phần gợi ý b và c nhé Cấm chép mạng
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