Tôi là một người thích nghe nhạc. Nghe nhạc sẽ giúp tôi cảm

thấy sảng khoái, dễ chịu trong những lúc mệt mỏi, làm việc quá

sức, trong khi nghe nhạc cũng giúp chúng ta học được rất nhiều

điều. Thích nghe nhạc cũng rất nhiều điều thú vị. Bạn có thích

nghe nhạc không, nếu vậy, hãy kết bạn với tôi!

ko chép mạng 100%

nhưng bài có vr hơi ngắn

I'm a person who loves to listen to music. Listening to

music will help me feel refreshed, pleasant during times

of fatigue, overwork, while listening to music also helps

us learn a lot of things. Interest in listening to music is

also a lot of interesting. Do you listening to music,

if so, please make friends with me!

Theo bài ra ta cs 

\(2x=3y\Rightarrow\frac{x}{3}=\frac{y}{2}\)

\(4y=5z\Rightarrow\frac{y}{5}=\frac{z}{4}\)

T lại cs 

\(\frac{x}{3}=\frac{y}{2}\Rightarrow\frac{x}{15}=\frac{y}{10}\left(1\right)\)

\(\frac{y}{5}=\frac{z}{4}\Rightarrow\frac{x}{10}=\frac{z}{8}\left(2\right)\)

Từ (1);(2) \(\Rightarrow\frac{x}{15}=\frac{y}{10}=\frac{z}{8}\)

ADTC dãy tỉ số bằng nhau ta cs 

\(\frac{x}{15}=\frac{y}{10}=\frac{z}{8}=\frac{2x+3y-4z}{2.15+3.10-4.8}=\frac{56}{28}=2\)

\(\Rightarrow\hept{\begin{cases}\frac{x}{15}=2\\\frac{y}{10}=2\\\frac{z}{8}=2\end{cases}\Rightarrow\hept{\begin{cases}x=30\\y=20\\z=16\end{cases}}}\)

\(2x=3y;4y=5z\) => \(8x=12y;12y=15z\)

=>  \(\frac{8x}{120}=\frac{12y}{120}=\frac{15z}{120}\)=> \(\frac{x}{15}=\frac{y}{10}=\frac{z}{8}\)

=>   \(\frac{2x}{30}=\frac{3y}{30}=\frac{4z}{32}\)

Áp dụng tính chất dãy tỉ số bằng nhau ta có:

\(\frac{2x}{30}=\frac{3y}{30}=\frac{4z}{32}=\frac{2x+3y-4z}{30+30-32}=\frac{56}{28}\)

=> \(\frac{2x}{30}=2=>2x=60=>x=30\)

\(\frac{3y}{30}=2=>3y=60=>y=20\)

\(\frac{4z}{32}=2=>4z=64=>z=16\)

vô số bn ạ

hình như đề có j đó sai sai

5. _________ Jim owns two cars, he rarely drives to work.
A. despite B. although C. however
6. The athlete completed the race _________ his pain.
A. despite B. although C. nevertheless
7. Jane looks pretty. She, _________, seems to lack personality.
A. despite B. although C. nevertheless
8. _________ we have a slim chance to win, we won’t lose hope.
A. despite B. although C. however
9. _________ of his bad luck, he won the medal.
A. in spite B. despite C. however
10. He is friendly _________ the fact that he’s very famous.
A. despite B. although C. however

5B 6A 9A 10A

O A D x C I z B E y

Xét tam giác AOC và tam giác BOC

có OC chung

góc BOC= góc AOC (GT)

góc CBO = góc CAO = 90⁰

suy ra tam giác AOC = tam giác BOC ( cạnh huyền- góc nhọn)

suy ra AC=BC ( hai cạnh tương ứng)

b) Xét tam giác BCE và tam giác ACD

có góc EBC = góc DAC = 90⁰

AC=BC ( CMT)

góc BCE = góc ACD ( đối đỉnh)

suy ra am giác BCE =tam giác ACD (g.c.g)

suy ra CE=CD (hai cạnh tương ứng)

suy ra tam giác ECD cân tại C

c) 

1_A           2_B         3_B          4_C          5_B

6_A          7_B          8_B          9_A         10_A

Make up sentences using the words and phrases given

1. We/ used/ school/ on/ foot

\(\rightarrow\)We used to go school on foot.

2. about/ 30km/ my town/ Ha Long Bay 

\(\rightarrow\)It is about 30km from my town to Ha Long Bay.

3. My family/ used/ go/ holiday/ seaside/ summer

\(\rightarrow\)My family used to go holiday on the seaside in the summer.

4. How long/ it/ take/ you/ Ha Noi/ Sa Pa

\(\rightarrow\)How long does it take you travel from Ha Noi to Sa Pa ? 

5. There/ used/ be/ a factory/ town centre/ but/ it/ move/ the/ suburbs

\(\rightarrow\)There used to be a factory in town center , but now it moves to the suburbs.

6. You/ must/ learn/ about/ road safety/ before/ riding/ your/ bike/ road

\(\rightarrow\)You must learn about road safety before riding your bike on road.

1 He has played the piano since he was 10

2 Computers are used to solve difficult problems

3 I haven't phoned her for 4 months

4 I have learnt French since 2010

5 The letter has been sent already (?)

6 The window was broken by the boys yesterday

7 I used to walk to school when i was a boy

8 ?

9 If you don't learn hard, you won't pass the exam

10 if i know the time, i wouldn't be late

11 if they are hard working, they wouldn't get bad marks

12 It is convenient to live near a market

13 If we don't hurry, we will be late

14 ?

15 If Lan doesn't eat too much, she wouldn't get overweight

              :D