PH
8
K
Khách
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PH
3
G
11
LT
29 tháng 7 2018
a) [ 195 + ( -116 ) ] - [ -195 + ( -116) ]
= ( -116 ) - 116
= -232
b) = -152
Câu b mk lười quá nên ko gải chi tiết
FB
3
23 tháng 5 2019
Trả lời :
2x + 9 = 16
2x = 16 - 9
2x = 7
x = 7 : 2
x = 7/2
~ Hok tốt ~
VC
Vũ Cao Minh⁀ᶦᵈᵒᶫ ( ✎﹏IDΣΛ亗 )
CTV
VIP
23 tháng 5 2019
Trả lời
2x + 9 = 16
2x = 16 - 9
2x = 7
x = 7 : 2
x = 3,5
Hok tốt
Bạn chắc là 2k7
21 tháng 11 2018
Ta có: \(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
\(\left(=\right)\frac{\frac{25}{4}}{x}=\frac{x}{1,96}\)
\(\left(=\right)x^2=12,25\)
\(=>\orbr{\begin{cases}x=3,5\\x=-3,5\end{cases}}\)
học tốt
16 tháng 10 2018
đề kiểm tra tiếng anh ne
I. Choose the word in each group that has the underlined part pronounced differently from the rest. (1 mark):
1. A. chair B. school C. couch D. children
2. A. sometimes B. moment C. stove D. close
3. A.biology B. geography C. physics D. fly
4. A. homework B. house C. hour D. here
II. Choose the best words by circling the letter A,B,C or D. (2 marks)
1. How ........ is it from your house to school?
A. far B. long C. old D. tall
2. What ......... intelligent boy!
A. the B. a C.an D. is
3. Would you some coffee?- __________
A. Yes, please B. Of course C. No, thanks D. Both A and C are correct.
4. This car is the ....... expensive of the four car.
A. Best B. more C. good D. most
5. They enjoy ........TV.
A. to watch B. watching C. to watching D. watched
6. A ..............work on a farm.
A. doctor B. farmer C. teacher D. journalist
7. She is very happy ........ you again.
A. meet B. meets C. to meet D. meeting
8. He is in class 7A and ............................... am I.
A. too B. so C. but D. by
III. Give the correct form of the verbs in the bracket. (2 marks)
1. Trang (not have) any friends in Ha noi. 1........................
2. Some boys and girls (play) marbles at the moment. 2........................
3. The students (visit) their old teacher next week? 3........................
4. Mr Nam usually (watch) TV in his free time? 4.......................
IV. Fill in the blanks with the correct form of the words in the capital letters (1 mark):
1. Today Lien is not....................because she misses her parents HAPPINESS
2. Living in the city is..................than living in the countryside NOISY
3. In electronics, we learn to repair. .........................appliances. HOUSE
4. My. ......................is tall and beautiful. TEACH
V. Read the passage carefully then answer the questions: (2 marks)
Linda lives with her parents in a big house in HCM City. She is from England. She is thirteen. She has blue eyes and black hair. She is studying at International Language School. She can speak French, English and Vietnamese. But she doesn't speak Vietnamese fluently. She often goes to French speaking club on Sunday mornings. She s Vietnamese people very much because they are friendly.
1. Where is Linda from?.........................................................................................
2. How many languages can she speak?........................................................................
3. Does she speak Vietnamese fluently?.......................................................................
4. Why does she Vietnamese people?..................................................................
VI. Arrange the following words to make correct sentences. (1 mark).
1. play/ will/ soccer/ this/ afternoon/ they.
.............................................................................................
2. my/ is/ favorite/ English/ subject.
.............................................................................................
VII. Complete the following sentences with the suggested words. (1 mark).
1. It / difficult/ find/ apartment / Ho Chi Mih City?
..................................................................................................
2. They/ listen/ music/ now.
15 tháng 8 2018
| x + 1 | = 2x - 3 - 1
| x + 1 | = 2x - 4
=> x + 1 thuộc { 2x - 4; -2x + 4 }
+) x + 1 = 2x - 4
1 + 4 = 2x - x
x = 5
+) x + 1 = -2x + 4
x + 2x = 4 - 1
3x = 3
x = 1
Vậy,..........
15 tháng 8 2018
\(\left|x-1\right|+1=2x-3\)
\(\Leftrightarrow\left|x-1\right|=2x-3-1=2x-4\)
-Nếu \(x-1\ge0\Leftrightarrow x\ge1\) thì biểu thức sẽ trở thành: \(x-1=2x-4\Leftrightarrow x-2x=-4+1\Leftrightarrow-x=-3\Leftrightarrow x=3\) (nhận)
-Nếu \(x-1< 0\Leftrightarrow x< 1\) thì biểu thức sẽ trở thành:
\(x-1=-\left(2x-4\right)\Leftrightarrow x-1=-2x+4\Leftrightarrow3x=5\Leftrightarrow x=\frac{5}{3}\) (loại)
Vậy x = 3
\(25+9+2006=2040\)
Chơi với Cô bé dũng cảm này có được không?