Cân khối lượng hòn sỏi được 8,0g trọng lượng viên sỏi là 0,08 Niuton

\(c,C=\dfrac{36}{43}+50\\ =\dfrac{2186}{43}\)

\(d,D=3^3\left(118-18\right)\\ =27.100\\ =2700\)

\(e,E=3\left(5.2^3+2^2\right)-35\\ =3.2^2\left(5.2+1\right)-35\\ =12.11-35\\ =132-35\\ =97\)

\(a,A=4.3-1\\ =11\)

\(b,\) Từ 1 -> 2013 có số số hạng là:

\(\dfrac{2013-1}{1}+1=2013\) ( số hạng )

\(\implies\) \(B=\dfrac{\left(2013+1\right).2013}{2}=2027091\)

1. What is Tam`s height?

=> How tall is Tam?

Lm nhầm :3 mk lm lại =.=

1. What is Tam`s height?

=> How heavy is Tam?

2. What was wrong with her?

=> What was the matter with her?

3. Why don`t we go to the movies tonight?

=> What about going to the movies tonight?

\(C=\dfrac{1}{2}\left(11+2\sqrt{30}\right)-\dfrac{\sqrt{30}}{2}-\dfrac{\sqrt{30}}{2}\\ =\dfrac{11}{2}+\sqrt{30}-\sqrt{30}\\ =\dfrac{11}{2}\)

\(B=\left(3+2\sqrt{6}+2\right)\left(25-20\sqrt{6}+24\right)\sqrt{3-2\sqrt{6}+2}\\ =\left(\sqrt{3}+\sqrt{2}\right)^2\left(5-2\sqrt{6}\right)^2\left(\sqrt{3}-\sqrt{2}\right)\\ =\left(\sqrt{3}+\sqrt{2}\right)\left(3-2\sqrt{6}+2\right)^2\\ =\left(\sqrt{3}-\sqrt{2}\right)^3\\ =9\sqrt{3}-11\sqrt{2}\)

\(A=\sqrt{8}-\sqrt{7}+5\sqrt{7}+2\sqrt{2}\\ =2\sqrt{2}-\sqrt{7}+5\sqrt{7}+2\sqrt{2}\\ =4\sqrt{2}+4\sqrt{7}\)

1. Miss Lan teaches us grammar and writing.

=> We are taught grammar and writing by Miss Lan.

2. The police have found him several days.

=> He have been found several days by the police.

3. She couldn't open the door of the classroom.

=> The door of the classroom couldn't be opened.

4. The government will be build the bridge in next July.

=> The bridge will be built by the government in next July.

5. Thomas Edition invented the eclentricity bulb.

=> The eclentricity bulb was invented by Thomas Edition.

6. They are going to visit their grandmother on the weekend.

=> Their grandmother is going to be visited on the weekend.

7. Tam advised me to take part in the course.

=> I was advised to take part in the course by Tam.

8. She has done that work since last week.

=> That work has been done since last week.

9. The heavy rain many damage the crop.

10. She shouldn't announce that news early.

=> That news shouldn't be announced early.

11. We have to test this product.

=> This product have to be tested.

12. They export bananas to Europe.

=> Bananas are exported to Europe.

13. Many visitor have visited Kuala Lumpur recent years.

=> Kuala Lumpur has been visited by many visitor recent years.

14. The sudents is going to plant more trees in the school garden.

=> More trees are going to be planted in the school garden by the students.

15. Bob didn't take that book from the desk.

=> That book wasn't taken from the desk by Bob.

16. People should keep fruits in the fridge for along.

=> Fruits should be kept in the fridge for along.

17. They will cut the grass in the park next week.

=> The grass will be cut in the park next week.

\(B=\dfrac{\sqrt{5}.\sqrt{2}\left(\sqrt{5}-\sqrt{2}\right)}{\sqrt{5}-\sqrt{2}}-\dfrac{6\left(2+\sqrt{10}\right)}{10-4}-2\sqrt{10}\\ =\sqrt{10}-\dfrac{12+6\sqrt{10}}{6}-2\sqrt{10}\\ =\sqrt{10}-2-\sqrt{10}-2\sqrt{10}\\ =-2-2\sqrt{10}\)