We have \(\dfrac{s}{\dfrac{t}{2}}+\dfrac{s}{\dfrac{t}{2}}=40+60=100\)
After that. we have:
\(\dfrac{s}{\dfrac{t}{2}}=\dfrac{s}{\dfrac{t}{2}}=\dfrac{s+s}{\dfrac{t}{2}}=\dfrac{2s}{\dfrac{t}{2}}=\dfrac{4s}{t}\)
\(\Rightarrow\dfrac{s}{t}.4=100\)
\(\Rightarrow\dfrac{s}{t}=\dfrac{100}{4}=25\left(\dfrac{km}{h}\right)\)
help
Question 7:Bottle A contains 15% syrup. Bottle B contains 40% syrup. When these 2 bottles of syrup are mixed, the syrup content is 30% and the total volume is 600ml. How much syrup is in the bottle A at first?
Let ABCD be a trapezoid with bases AB, CD and O be the intersection of AC and BD. If the areas of triangle OAB, triangle OCD are 16cm2, 40cm2respectively and M is the midpoint of BD, then the area of the triangle AMD is .........cm2.
Question 14:Suppose that the polynomial f(x) = x5 - x4 - 4x3 + 2x2 + 4x + 1 has 5 solutions x1; x2; x3; x4; x5. The other polynomial k(x) = x2 - 4.
Find the value of P = k(x1) x k(x2) x k(x3) x k(x4) x k(x5)
V. Arrange the words into the sentences (2ms)
1. want/ Tom/ Mary/ and/ glasses/ two/ of/ water.
....................................................................
2. sister/ my/ going/ is/ to/ live/ country/ the/ in.
.................................................................
3. going/ dinner/ tonight/ is/ have/ to/ where/ Lan?
....................................................................
4. the/ spring/ in/ what/ weather/ is/ like/ the?
.........................................................................
5. building/ tallest/ the/ is/ this/ city/ the/ in/ world.
...........................................................................
6. Lan's house/ smaller/ is/ house/ my/ than.
....................................................................
7. she/ never/ with/ camping/ goes/ her/ friends.
.....................................................................
8. often/ she/ go/ does/ how/ cinema/ to/ the?
....................................................................
EX: Read the passage, and choose the correct answer A, B, C or D for each question.
For many of us, food isn't that important. However, for a few people, food is very improtant. For these people, meals are a kind of art.
These people are interested in something called "haute cuisine" . Haute cuisine is French for "high cooking" . You can usually find haute cuisine in fancy French hotels anh high level restaurants.
Haute cuisine has changed over the years, but the most important parst have remained the same. Haute cuisine meals are almost always very complicated, and they take a very long time to make. Usually, an haute cuisine meal has very many small dishes, instead of a few large ones. Also, with haute cuisine dishes, the appearance is very important. Of course, an haute cuisine dish must taste wonderful, but that is not enough. An haute cuisine dish must also look beautiful. Another very important part of haute cuisine is wine. Chefs and customers always try to select a wine that is a perfect match for their meal. The wine that people drink with haute cuisine is often very rare. You will not be surprised to hear that haute cuisine dishes are almost always very expensive.
Haute cuisine is traditionally French, but other countries have similar concepts of food. People often compare Japanese kaiseki to haute cuisine. Kaiseki is another very complicated, very high level kind of food. In Japan, kaiseki is also considered a kind of art. When Japanese chefs prepare kaiseki, they don't just consider the taste of the food. They also consider the food's texture, colour, and appearance. Chefs even match the colour of the food to the colour of the plate and the chopsticks. Of course, although haute cuisine and kaiseki share many similarities, the food itself is quite different.
If you ever get the chance to try kaiseki or haute cuisine , remember one thing: You are not just having a meal, you are enjoying a very special kind of art.
1. What can we say about the wines that people drink with haute cuisine?
A. Theyall come from France.
B. They are all quite common.
C. They are always red wine.
D. They are usually rare.
2. What is true about the dishes in haute cuisine?
A. Haute cuisine usually has many small dishes.
B. Haute cuisine usually has just a few large dishes.
C. Haute cuisine usually has many large dishes.
D. Haute cuisine usually has just a few small dishes.
3. What does the fifth sentence of the third paragraph mean?
A. Haute cuisine has to taste good, but is has to be good in other ways, too
B. Haute cuisine only has to taste good.
C. Haute cuisine has to look good, but it doesn't have to taste good.
D. Every haute cuisine dish tastes the same.
4. What does the passage NOT say about haute cuisine?
A. It is very expensive.
B. It takes a short time to make.
C. It is very complicated.
D. It is usually served in fancy hotels and high level restaurants.
5. What does the passage say about kaiseki and haute cuisine?
A. The food is the same in both.
B. People never care about them.
C. People often compare them.
D. Haute cuisine is older than kaiseki.
2. Tom was seriously advised by his teacher, but he insisted in disturbing the class.
a. Although ....................................................................................................................................
b. In spite of ..................................................................................................................................
3. Mary tried several times, but she couldn’t find a taxi.
a. Although, ..................................................................................................................................
b. In spite of ..................................................................................................................................
4. Although he felt tired, he stayed up to keep us company.
Despite ..........................................................................................................................................
5. They didn’t have much time, however they came to visit us.
In spite of ......................................................................................................................................
6. He is too old, but he still does his gymnastics every morning.
a. Although ...................................................................................................................................
b. Despite ......................................................................................................................................
7. Although the shirts are very expensive, people buy them because they are trendy.
In spite of ......................................................................................................................................
8. Although he had no qualifications for it, he got the job.
In spite of ......................................................................................................................................
9. I didn’t like the CD you have recommended me, but I bought it all the same.
a. Although ...................................................................................................................................
b. In spite of...................................................................................................................................
10. I told her all the truth. However she didn’t believe me.
a) Although ...................................................................................................................................
b) In spite of...................................................................................................................................
11. They didn’t play well, but they won the game.
a) Although ...................................................................................................................................
b) Despite ......................................................................................................................................
12. They felt very cold but they didn’t turn on the heater.
Despite ..........................................................................................................................................
13. Bill had a terrible headache. However he kept working.
a) Although ...................................................................................................................................
b) In spite of ..................................................................................................................................
14. He has all the necessary books but he doesn’t use them to study.
Despite ..........................................................................................................................................
15. She works very hard but she doesn’t deserve a raise.
a) Although ...................................................................................................................................
b) In spite of ..................................................................................................................................
16. She is not prepared for the test, but she has to do it.
Despite ..........................................................................................................................................
17. She was ill but she had to go to school.
Although .......................................................................................................................................
18. It was a nice sunny but there was nobody at the beach.
a) Although ...................................................................................................................................
b) Is spite of ..................................................................................................................................
19. He arrived later but he finished work earlier than the others.
Although .......................................................................................................................................
20. The new waitress seems honest and diligent. However the boss doesn’t like her.
a) Although ...................................................................................................................................
b) In spite of ..................................................................................................................................
một người đi từ nhà đến sân ga. Trong 12 phút đầu, người đó đi được 700m và thấy rằng như vậy sẽ đến sân ga chậm 40 phút, vì thế trên quãng đường còn lại người ấy đi với vận tốc 5 km/h nên đến sân ga sớm 5 phút. Hãy tính quãng đường từ nhà đến sân ga
Cho biểu thức: A = 1/1 - căn x + x căn x/căn x - 1
a,ĐKXĐ và rút gọn
b,Tìm GTNN của P = A-2 căn x
Hơi khó hiểu tí mn thông cảm nha
1.Do you really ______ me to believe you ?
A. plan B. wait C. think D. expect
2.I don't believe a word she says, I think she ______
A. is lying B. lied C . is telling lie D. is laying
3.The judge _____ the pedestrian for the accident .
A. blamed B. charged C. sued D. accused
4.Your father's death was a terrible shock. I would like to show my deeply sad ____ to you .
A. emotional B. emotionally C. emotion D. emotionless
Làm rồi giải thích giúp mình nha cảm ơn nhiều
1. The car isn’t very nice, but it serves its purpose.
Although .......................................................................................................................................
2. Betty isn’t very tall, but she can run very fast.
Although .......................................................................................................................................
3. He doesn’t have much money, but he wants to buy car. Although........................................................................................................................................
4. There wasn’t much food at the party. However, everybody had a good time. Although........................................................................................................................................
5. He’s a hard worker. However he van newer save enough to buy a car
Although...................................................................
giải bài toán bằng cách lập phương trình
1 người đi xe máy từ A-->B vs vận tốc TB 40km/h.Lúc về người ấy đi vs vận tốc TB 30 km/h,biết rằng thời gian cả đi lẫn về hết 3 giờ 30 phút.tính quãng đườngAB
làm ơn giúp mk đi thanks trước nha
