1) Thực hiện phép tính:

a) A= \(\sqrt{243}\) -\(\sqrt{27}\)+ \(\sqrt{3}\) -\(\sqrt{48}\)

b) B= \(\dfrac{5+\sqrt{5}}{\sqrt{5}}\) +\(\dfrac{3+\sqrt{3}}{\sqrt{3}+1}\) -(\(\sqrt{3}\) + \(\sqrt{5}\) )

có thể làm về nón lá , cỡ 13 câu thôi ah!

Put the following sentences into the opposite voice (actice or passive) 

LÀM BAO NHIÊU CÂU CŨNG ĐC AH , MIK ĐANG CẦN GẤP !!!

1. The electric light bulb was invented by Thomas Edison

=> ___________________________________________________________

2. The government will bring electricity to remote areas next year.

___________________________________________________________

3. The passage will be read three times by the examiner.

___________________________________________________________

4. Somebody has driven them to the airport.

___________________________________________________________

5. Nobody sent us any tickets. ___________________________________________________________

6. People must repair that old building.

___________________________________________________________

7. Lan's parents have to clean up their house before Tet holidays ___________________________________________________________

8. Will renewable energy completely replace fossil fuels in the future?

___________________________________________________________

9. When did your friend eat that chocolate cake?

___________________________________________________________

10. Did anything disturb you in the night? ___________________________________________________________

11. The complaints should be sent to the main office.

___________________________________________________________

12. Lan is going to invite her friends to her birthday party.

___________________________________________________________

13. The police are interviewing people who saw the robber in the bank yesterday ___________________________________________________________

14. We can’t repair your clock.

___________________________________________________________

15. According to the inspector, lightning burned down the forest. ___________________________________________________________

Put the following sentences into the opposite voice (actice or passive)

1. The electric light bulb was invented by Thomas Edison

=> ___________________________________________________________

2. The government will bring electricity to remote areas next year.

___________________________________________________________

3. The passage will be read three times by the examiner.

___________________________________________________________

4. Somebody has driven them to the airport.

___________________________________________________________

5. Nobody sent us any tickets. ___________________________________________________________

6. People must repair that old building.

___________________________________________________________

7. Lan's parents have to clean up their house before Tet holidays ___________________________________________________________

8. Will renewable energy completely replace fossil fuels in the future?

___________________________________________________________

9. When did your friend eat that chocolate cake?

___________________________________________________________

10. Did anything disturb you in the night? ___________________________________________________________

11. The complaints should be sent to the main office.

___________________________________________________________

12. Lan is going to invite her friends to her birthday party.

___________________________________________________________

13. The police are interviewing people who saw the robber in the bank yesterday ___________________________________________________________

14. We can’t repair your clock.

___________________________________________________________

15. According to the inspector, lightning burned down the forest. ___________________________________________________________

Cho 3,45 g kim loại Natri tác dụng với sau 162 gam H2O

a)Tính thể tích khí H2 thu được ( ở đktc)

b) Tính nồng độ phần trăm của dung dịch bazơ thu được sau phản ứng

giải chi tiết giúp mình với ah

cho a ≥ 2 , tìm giá trị nhỏ nhất của S=a²+ \(\dfrac{1}{a^2}\)

Cho $\Delta ABC$ , trên cạnh AB lấy điểm D , kẻ DE song song với BC ( $E\in AC$ ) . Kẻ đường thẳng Cx song song vs AB , Cx cắt đường thẳng DE ở K . Gọi H là giao điểm của AC và BK

a , Chứng minh : $\Delta ABC\sim \Delta CEK$

b , Chứng minh ; BC . HE = HC . KE

c , Giả sử diện tích tam giác ABC là 36 $c{m}^2$ ; AD = 2DB . Tính diện tích tam giác BHE

Vẽ hình giúp mik vs ah . lm câu C) thôi ah

Giải bài toán bằng cách lập phương trình: Một phân số có mẫu số lớn hơn tử số là 7 đơn vị. Nếu giảm tử số 1 đơn vị thì được một phân số mới bằng \(\dfrac{1}{3}\). Tìm phân số bạn đầu?