Vũ Như QuỳnhThảo Phương Hoàng Minh NguyệtHồ Bảo Trâm

'đóng cửa sổ lại, làm ơn' cô ấy nói với tôi

'làm ơn giúp tôi với, minh' cô ấy nói với tôi

đừng hút thuốc, cô ấy đã nói với tôi

làm ơn đừng đến sau, cô ấy nói

1 She told me to close the window

2 She told Minh to help her

3 She told me not to smoke

4 She told Hoa not to be later

\(5^{x+2}-5^x=3.10^3\)

\(\Rightarrow5^x\left(5^2-1\right)=3000\)

\(\Rightarrow5^x.24=3000\Rightarrow5^x=125=5^3\)

\(\Rightarrow x=3\)

\(5^{x+2}-5^x=3\cdot10^3\)

\(\Leftrightarrow5^x\cdot24=3000\)

\(\Leftrightarrow x=3\)

có thiếu dấu ko ạ ?

có bị thiếu dấu không vậy bạn

a) x + 45 -[ 90 + (-20) + 5 - (-45)] +3x

= x +45 -( 90 - 20 + 5 + 45) + 3x

= x +45 -120 +3x

= -75 +4x

b) x +(-294 +13 -2x) +(94 -13) +9x

= x -281 -2x +81 +9x

= -200 +8x

\(2x^2-x-10=0\Leftrightarrow2x^2-5x+4x-10=0\)

\(\Leftrightarrow\left(2x-5\right)\left(x+2\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\frac{5}{2}\\x=-2\end{matrix}\right.\)

1. She doesn't like listening to music.

=> She hates listening to music.

2. Nam said to Lan ''Please turn on the lights for me''

=> Nam told Lan to turn on the lights for me.

3. My brother said to me ''Can you lend me some money?''

=> My brother asked me if I could lend him some money.

4. ''Please wait for me outside my room'', she said to me

=> She told me to wait for her outside her room.

5. Hung told Nam, ''Could you help me with my english?''

=> Hung told Nam if he could help him with his english.

_Mình không chắc lắm, nếu sai thì nhắc mình nhé!_

a) 1/5 - (1/2 + 3/4 ) : 5/2

= 1/5 - ( 1/4 + 3/4 ) : 5/2

=1/5 - 1 : 5/2

= 1/5 - 1 . 2/5

= 1/5 - 2/5

= -1/5

b) 1,5 . (1/3 - 2/3)

=3/2 . ( -1/3)

=-1/2

c) 9/10 . 23/11 - 1/11 . 9/10 + 9/10

= 9/10 . ( 23/11 - 1/11 ) + 9/10

= 9/10 . 1 + 9/10

= 9/10 + 9/10

= 18/10 = 9/5

Old man:  Can you please do me a favor?   Ba: ...............

       A. Yes. Please help me                                       B. Sure. How can I help you?

       C. Yes, you can                                                     D. No, you can't

 Câu 7. The children can look after ............................... for a few days.

       A. them                           B. they                          C. themself                   D. themselves

 Câu 8. My grandfather used ____________ us to the zoo when he was alive.

       A. took                             B. to take                     C. taking                       D. take

 Câu 9. Choose the underlined word or phrase in each sentence  that  needs correcting.

         The armchair is in the living-room among the television and the sofa.

                       A        B                                        C                                 D

Câu 10. My hometown is getting more modern and .....................

       A. more noisy                B. noisier                     C. noisiest                     D. more noisier

 Câu 11. The water wasn't ____________ in.

       A. clear enough for swimming                         B. enough clear for swimming

       C. enough clear to swim                                    D. clear enough to swim

 Câu 12. Choose the word that has the underlined part pronounces  differently

       A. looked                        B. phoned                   C. missed                      D. watched

 Câu 13. Don't come in. Pleased wait ____________ for your turn.  

       A. outside                       B. inside                       C. downstairs              D. upstairs

 Câu 14. We must be there....................7.30 and 10.30.

       A. between                     B. at                              C. after                          D. before

 Câu 15. His father is very proud  ________  him.

       A. on                                B. about                       C. of                               D. with

 Câu 16. They …………….. in that house for 3 years.

       A. have lived                  B. live                            C. lived                          D. are living   

 Câu 17. Choose the word that has a different stress pattern from the others.

       A. plentiful                      B. generous                C. volunteer                 D. sociable