Ta có : \(\frac{6}{11}x=\frac{9}{2}y\)=> \(\frac{12x}{22}=\frac{99y}{22}\)=> 12x = 99y => 4x = 33y => \(\frac{x}{33}=\frac{y}{4}\)

\(\frac{9}{2}y=\frac{15}{5}z\)=> \(\frac{45y}{10}=\frac{30z}{10}\)=> 45y = 30z => 3y = 2z => \(\frac{y}{2}=\frac{z}{3}\)

=> \(\frac{x}{33}=\frac{y}{4};\frac{y}{2}=\frac{z}{3}\)

=> \(\frac{x}{66}=\frac{y}{4};\frac{y}{4}=\frac{z}{12}\)

=> \(\frac{x}{66}=\frac{y}{4}=\frac{z}{12}\)và y - x + z = -120

Áp dụng t/c dãy tỉ số bằng nhau ta có :

\(\frac{x}{66}=\frac{y}{4}=\frac{z}{12}=\frac{y-x+z}{4-66+12}=\frac{-120}{-50}=\frac{12}{5}\)

=> \(\hept{\begin{cases}\frac{x}{66}=\frac{12}{5}\\\frac{y}{4}=\frac{12}{5}\\\frac{z}{12}=\frac{12}{5}\end{cases}}\)=> \(\hept{\begin{cases}x=\frac{792}{5}\\y=\frac{48}{5}\\z=\frac{144}{5}\end{cases}}\)

Choose the right word to fill in the blanks

1. .....Can..........you help me ? ( Can, Should, May )

2. .....No......proplem, sir ! ( Any, Without, No )

3. .........May.......I help you, Madam ? ( Should, May, Need )

4. Yes. That's very.........knid.......of you. ( help, kind, fine )

5. Could you.....do..........me a favor ? ( do, make, take )

6. I'm......sorry..........I'm really busy ( pity, not good, sorry )

7. Do you......need..........any help ? ( have, need, think )

8. No,.....thank you.......I'm fine. ( sorry, thank you, OK )

9. .........Let.........me help you. ( Give, Let, Ask )

10. Let him.....does.........what he wants ( do/ does )

10. I need a favor.

( That's very kind of you / How can I help you ? )

11. My mother is busy .................( to cook, cooking )

12. Mrs Xuan looks very...............( happy/ happily )

13. After filling the form, please..........it back to me ( bring / take )

Choose the right word to fill in the blanks

1. ...............you help me ? ( Can, Should, May )

2. ...........proplem, sir ! ( Any, Without, No )

3. ................I help you, Madam ? ( Should, May, Need )

4. Yes. That's very................of you. ( help, kind, fine )

5. Could you...............me a favor ? ( do, make, take )

6. I'm................I'm really busy ( pity, not good, sorry )

7. Do you................any help ? ( have, need, think )

8. No,............I'm fine. ( sorry, thank you, OK )

9. ..................me help you. ( Give, Let, Ask )

10. Let him..............what he wants ( do/ does )

10. I need a favor.

( That's very kind of you / How can I help you ? )

11. My mother is busy .................( to cook, cooking )

12. Mrs Xuan looks very...............( happy/ happily )

13. After filling the form, please..........it back to me ( bring / take )

1. Can

2. No

3. May

4. kind

5. do

6. sorry

7. need

8. thank you

9. Let

10. do

11. How can I help you?

12. to cook

13. happy

14. take

Normally, when I have free time, I usually play sports, watch tv, surf webs and read books. After learning stressful hours, such activities help me entertain and relax. And playing sport is the free time activity I like best. Firstly, I like to play sport because it is really a healthy activity. You know, sports provide many benefits for our health. It can improve health and help us to be strong. In the addition, sport help us increase in stature and have a excellent body. Secondly, I like sports. I feel as dynamic as possible. Moreover, It makes me full of energy. Lastly, well, It is what I enjoy most when playing sports. That is sports can help us take up the community. We will knows a lot of people having the same interests in playing sports.Trust me, I was acquainting a lot of friends when I play sports. In short, I like to play sport because it provides many benefits for me. And you? What activities do you like best in your free time?

1. He's always ...helping..... to me (help)

2. She's always ....explaining...... about homework (explain)

3. Hoa is..excited.....about her trip tomorrow(excite)

4. The village is ...suitable...   in the valley (situate)

5. She find it ....interesting...... to take picture of flowers (interest)

6. All .flyer..... may be cancelled because of the fog (fly)

7. The telephone has been widely used since its...invents...... (invent)

8. He's always ...hospitalized... to the visitors (hospitability)

9. Son is a.....successful......business man (success)

10. You must be ..careful...... when you open that door (care)

11. My sister is ....the tallest.. in her class (tall)

12. I don't know how you .....celebrate.. your birthday (celebration)

13. We are very ...interesting... football (interest )

14. Are you fond of .....playing.... sports ? (play )

15. Don't go to see that play, it is very ...boring...... (bore)

16. Jack doesn't mind ....working..... at night (work)

17. Can you drive a bit more ....slowly..... please! (Slow)

18. France is .....famous... for its beautiful spots (fame)

19.Angkor Wat is one of the .....most wonderful... of the the world (wonderful)

20. It is hard to find .to accommondate..... in the summer ( accommondate)

1. He's always ....helpful.... to me (help)

2. She's always ....explaining...... about homework (explain)

3. Hoa is...excited....about her trip tomorrow(excite)

4. The village is ...situation...   in the valley (situate)

5. She find it ....interesting...... to take picture of flowers (interest)

6. All ..flights.... may be cancelled because of the fog (fly)

7. The telephone has been widely used since its...invention...... (invent)

8. He's always ..hospitabling.... to the visitors (hospitability)

9. Son is a....suceed.......business man (success)

10. You must be .....careful ... when you open that door (care)

11. My sister is ...the tallest... in her class (tall)

12. I don't know how you .....celebrate.. your birthday (celebration)

13. We are very ...interesting... football (interest )

14. Are you fond of .....playing.... sports ? (play )

15. Don't go to see that play, it is very .....boring.... (bore)

16. Jack doesn't mind ...working...... at night (work)

17. Can you drive a bit more ...slowly...... please! (Slow)

18. France is ....famous.... for its beautiful spots (fame)

19.Angkor Wat is one of the .....most wonderful ... of the the world (wonderful)

20. It is hard to find ..to accomodation.... in the summer ( accommondate)

1. He's always ....helpful.... to me (help)

2. She's always .....explaining..... about homework (explain)

3. Hoa is....excited.....about her trip tomorrow(excite)

4. The village is ....situated..   in the valley (situate)

5. She find it .....interesting..... to take picture of flowers (interest)

6. All ....flights... may be cancelled because of the fog (fly)

7. The telephone has been widely used since its.....invention.... (invent)

8. He's always ....hospitable.... to the visitors (hospitability)

9. Son is a.....successful......business man (success)

10. You must be ....careful.... when you open that door (care)

11. My sister is ....the tallest... in her class (tall)

12. I don't know how you ....celebrate... your birthday (celebration)

13. We are very ....interested in... football (interest )

14. Are you fond of .....playing.... sports ? (play )

15. Don't go to see that play, it is very .....boring.... (bore)

16. Jack doesn't mind .....working.... at night (work)

17. Can you drive a bit more .....slowly.... please! (Slow)

18. France is ....famous.... for its beautiful spots (fame)

19.Angkor Wat is one of the .....wonders.... of the the world (wonderful)

20. It is hard to find ....accommodations.... in the summer ( accommondate)

= 148140 nha 

Please explain in detail

=11^2005/11^2003+11^2004/11^2003

=11^2+11

=121+11

=132

\(\frac{11^{2005}+11^{2004}}{11^{2003}}\)

\(=\frac{11^{2003}\left(11^2+11\right)}{11^{2003}}\)

\(=11^2+11=121+11=132\)

Điền từ.

7. Be…quiet……, please!

8. Don't…talk in the class……,please!

9. No, you.....don't......

10. …Come…… here, please!

11. …May… I come in, Mr. Loc?

7. Be quiet , please

8. Don't make noisy, please

9. Come here, please

10. No, you didn't

11.May I come in, Mr Loc