Me: What are you doing on Sunday afternoon?

Friend: I’m not doing anything. / Nothing much.

Me: Do you want to see a movie with me?

Friend: Sure. What movie is it?

Me: It's "The Journey to Mars".

Friend: What time does it start?

Me: It starts at 4 p.m.

Friend: Great! See you then.

Me: What are you doing on Saturday morning?

Friend: I’m free.

Me: Would you like to go to the movies with me?

Friend: Sounds good. What movie do you want to watch?

Me: How about "The Forest Book"?

Friend: What time is it on?

Me: It's at 10 a.m.

Friend: OK, let's meet at the cinema at 9:45.

1 create $\rightarrow$ c. energy (tạo ra năng lượng)

2 drive $\rightarrow$ a. machinery (vận hành máy móc)

3 generate $\rightarrow$ e. electricity (phát/tạo ra điện)

4 turn $\rightarrow$ b. turbines (quay tua-bin)

5 heat $\rightarrow$ d. houses (sưởi ấm nhà cửa)

b

1 How many types of energy sources are mentioned in the text? What are they?
$\rightarrow$ Two types of energy sources are mentioned. They are renewable and non-renewable energy sources. (hoặc kể tên cụ thể: fossil fuels/coal/oil, hydro power, nuclear power, wind power, solar power)

2 What are the disadvantages of hydro and nuclear power?
$\rightarrow$ Hydro power is expensive to build dams, and nuclear power can be very dangerous.

3 Why do you think the wind and the sun are called alternative sources of energy?
$\rightarrow$ Because they are clean, renewable, and can be used instead of non-renewable sources (fossil fuels).

4 What types of energy does Viet Nam use most?
$\rightarrow$ Viet Nam uses hydro power and fossil fuels (coal, gas, oil) most.

5 What does the professor think Viet Nam will use more in the future?
$\rightarrow$ He thinks Viet Nam will use more renewable energy sources like solar and wind power in the future.

1,2 + 2,3 + 3,4 - 4,5 + 5,6 - 6,7 + 7,8 - 8,9 + 9,1 = 9,3

bạn phúc làm sai rồi phải bằng 5,5 cơ

Bài 2:

Đặt \(\frac{a}{b}=\frac{c}{d}=k\Rightarrow\begin{cases}a=kb\\c=kd\end{cases}\)

=> \(\frac{5a+3b}{5a-3b}=\frac{5kb+3b}{5kb-3b}=\frac{b\left(5k+3\right)}{b\left(5k-3\right)}=\frac{5k+3}{5k-3}\left(1\right)\)

\(\frac{5c+3d}{5c-3d}=\frac{5kd+3d}{5kd-3d}=\frac{d\left(5k+3\right)}{d\left(5k-3\right)}=\frac{5k+3}{5k-3}\left(2\right)\)

Từ (1) và (2) => \(\frac{5a+3b}{5a-3b}=\frac{5c+3d}{5c-3d}\)

Bài 3:

Đặt \(\frac{a}{b}=\frac{b}{c}=\frac{c}{d}=k\)

=> \(\frac{a}{b}.\frac{b}{c}.\frac{c}{d}=k^3\)

=> \(\frac{a}{d}=k^3\) (1)

Lại có: \(\frac{a+b+c}{b+c+d}=\frac{a}{b}=\frac{b}{c}=\frac{c}{d}=k\)

=> \(\left(\frac{a+b+c}{b+c+d}\right)^3=k^3\) (2)

Từ (1) và (2) => \(\frac{a}{d}=\left(\frac{a+b+c}{b+c+d}\right)^3\)

x + 3 + 9 chia hết x + 3

9 chia hết x + 3

x + 3 thuộc Ư ( 9 )

mà Ư (9) = ( 1,3,9 )

hay x + 3 thuộc ( 1,3,9 )

ta có bảng

x + 3                     1                     3                      9

x                           -2                    0                      6

ĐG                       Loại                 TM                   TM

Vậy x thuộc ( 0 , 6 )

\(\frac{2}{5}+x=\frac{4}{10}\)

\(x=\frac{4}{10}-\frac{2}{5}\)

\(x=0\)

Tk mk nha ~~ ^_^

Ai tk mk  mk tk lại ~~ ^^

Kb vs mk nha m.n ~~ n_n

\(\frac{2}{5}+x=\frac{4}{10}\)

\(x=\frac{4}{10}-\frac{2}{5}\)

\(x=0\)

Có số pt là: ( 100 - 1 ) : 3 + 1 = 34 số

có số cặp là: 34 : 2 = 17 cặp

-3 + -3 + -3 + ......... + -3

= -3 . 17 = -51

I think it's gonna be like this:

5. I don't have much time so I don't use the Internet very often.

6. Tuan finds playing table tennis interesting because he often plays with his best friend.

7. I'm now having felt tired since I stayed up late to do my homework.

8. My homework will be finished by midnight.

9. We won't go anywhere until Tom comes.

10. That's one of the most interesting books I have ever read.

5 i don't have much time so i don't use the Internet very often.

6 Tuan finds playing table tennis interesting because he plays with his best friend

7 i have been feeling tired since i stayed up late to do my homework

8 My homework will have been finished be midnight

9 we haven't gone anywhere until Tom comes

10 that is one of the most interesting books i have ever read