Nếu không tăng tốc mà chỉ đi 5 giờ thì còn cách B. Khoảng cách này xe gắn máy chạy trong 1 giờ (giờ thứ 6) cũng chính là vận tốc của xe.
10,5 x 5 = 52,5 (km)
Đáp số:   52,5 km/giờ. 

Số lít nước bể có thể chứa là :

4 x 3,6 x 2,4 = 34,56 ( m³ )

Đổi : 34,56 m³ = 34560 dm³ = 34560 lít

Số lít nước người ta đã sử dụng là :

34560 : 100 x 70 = 24192 ( lít nước )

Đáp số : 24192 lít nước

=> 2x = - 3

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

\(\Rightarrow3\left(7+x\right)=8\left(x-10\right)\)

\(\Rightarrow21+3x=8x-80\)

\(\Rightarrow5x=101\)

\(\Rightarrow x=\frac{101}{5}\)

Thời gian ô tô chở hàng đi trước ô tô du lịch là :

8 giờ 30 phút - 7 giờ = 1 giờ 30 phút 

Đổi : 1 giờ 30 phút = 1,5 giờ

Quãng đường ô tô chở hàng đi trước ô tô du lịch là :

40 x 1,5 = 60 ( km )

Hiệu vận tốc của hai xe là :

65 - 40 = 25 ( km/giờ )

Thời gian để ô tô du lịch đuổi kịp ô tô chở hàng là :

60 : 25 = 2,4 ( giờ )

Đổi : 2,4 giờ = 2 giờ 24 phút

Ô tô du lich5 đuổi kịp xe máy lúc :

8 giờ 30 phút + 2 giờ 24 phút = 10 giờ 54 phút

Đáp số : 10 giờ 54 phút

\(\Rightarrow\left(x-1\right)\left(1-x\right)=3.27\)

\(\Rightarrow\left(x-1\right)\left(-1\right)\left(x-1\right)=81\)

\(\Rightarrow\left(x-1\right)^2=-81\)

Mặt khác \(\left(x-1\right)^2\ge0\) với mọi x

=> \(x\in\varnothing\)

1 she .teaches.  us english at scholl        TEACHER
2 In my .neighborhood., there is a park            NEIGHBOR
3 Bac Giang has a lot of .beautifull.. places     BEAUTI
4 what is the .highest.. of the mountian       HIGH
5 we often buy cheap bread in the bakery...       BAKE
6 they have a lot of ..activevities..  in the summer        ACT
7 this is the...oldest.. pagoda in Bac Giang      OLD
8 don't ride too quickly. It is .dangerous.....     DANGER
9 my house is ..bbigger..   than your   BIG
10 he greets me in a..friendly.. way       FRIEND
11 there are four .bookshelves...    in my house     BOOKSHELF
12 the photocopy in between the bakery...  and the drugstore    BAKE
13 Is your brother an...actor... ?   ACT
14 Mai's sister is a......singer.     SING 
15 we must be ..carefull.. when we cross the road .        CARE
16 this tree has a lot of green ....leaves.     LEAF
17 Is your father a..businessman...?  BUSINESS
18 I'm Vietnamese.What's your.nationality....?     NATION
19  Air...polution.  is a big problem in many cities in the world          POLLUTE
20 Yoko is from Japan. She is ..Japanese...       JAPAN
21 Anna likes attending the English ..speaking.....  contests      (SPEAK)
22 My neighborhood is ..famous....   for good and cheap restaurants  (FAME)
23 I like the city live because there are many kinds of ...entertainment..     (ENTERTAIN)
24 Van's classroom is on the ..second..   floor     (TWO)
25 these children like .sunny....   weather (SUN)
26 Lan speaks English ...better..  than me    (WELL)
27 The Great Wall of China is the world's .longest...   structure  (LONG)
28What's Maco's .nationality..? - She is British.     ( NATION)
29 don't make a fire here.It's very ..dangerously....     (DANGER)
30 there are a lot of ..beautiful...  mountians in Vitenam    (BEAUTY)
31 This is the ..oldest... pagoda in our country    (OLD)
32 SHE IS VERY..beatiful. (BEAUTY)
33 It is very .noisy.. in the city  (NOISE)
34 her .teeth...    are small and white (TOOTH)
35  there are two secretaries.. in his office    (SECRETARY)
36do you know the ...writer.  of this book?  (WRITE)
37 THIS is my favorite chair.It's so ...comportable. (COMFORT)
38my father often..finishes..  his work at 4.30   ( FINISH)
39 Th Mekong River is the longest... river in Vietnam    (LONG)
40  Tokyo is ...bigger    than London. ( BIG) 
41 Ho Chi Minh city is the ..biggest. city in Vietnam ( BIG)
42 Petronas Twin Towers is ...taller   than Sears Tower (TALL)
 43 My sister is older... than my   (OLD)
44 Nam is ...shorter   than Ba.He is the ..the shortest..  boy in Vietnam     (SHORT) 
45 Phanxipang is the ..highest..  mountian in Vietnam ( HIGH)
46 These books are thicker... than those Books   (THICK)
47 It's the ..tallest.   building in this city.    (tall)
48 The Nile River is .longer..  than the Amazon River  (long)
49 My aunt has two.children..,one boy and one girl      (CHILD)
50 In th library we read about ..wonderfull.. things  ( WONDER)

\(\Rightarrow\left(x-1\right)\left(-8\right)=12\)

\(\Rightarrow x-1=-\frac{4}{3}\)

\(\Rightarrow x=-\frac{1}{3}\)