Một đoạn dây thép dài \(1,5m\) có khối lượng \(2,4kg\) . Muốn lấy ra \(60 m\) dây thép như thế cần phải cân bao nhiêu kg ?

Cho \(\bigtriangleup{ABC}\) có bình phương cạnh huyền 289 và diện tích là 60 . Tính độ dài hai cạnh góc vuông

Find the underlined part which is not correct show your answer by circling the letter A , B , C or D .

1. There are many different types of fishes in the Aquarium .

A B C D

2. We are happy hearing that you've passed your final exams .

A B C D

3. I entered the dentist's surgery , feeling little scared .

A B C D

4. How many times in a day do you brush your teeth ?

A B C D

5. The common cold is very unpleasant , but nobody know a cure for it .

A B C D

6. She bought some souvenirs from the shop and so was I .

Fill in each numbered blank with ONE suitable word .

Do want to be fitter and healthier ? Would you like to look younger ? Do you want to feel ....... relaxed ? Then try a few days at a health farm . Health farms are becoming ...... of the most popular places ...... a short break . I went to Henley Manor for a weekend . It's ...... largest health farm in the country ...... it isn't the most expensive . After two days of exercise I ...... ten times better . But the best thing for me was the food . It was all very healthy , of ......... but it was excellent , too !

If you're looking for something a ..... cheaper , try a winter break . Winter is the darkest and the coldest ......... of the year , and it can also be the worst time for your body . We all eat too ....... and we don't take enough exercise . A lot of health farm offer lower prices Monday to Friday from November to March .

Give the correct form of the words in parentheses :

1. She often feels ______ when she gets bad marks . ( happy )

2. My stomachache ______ after I took the tablets . ( appear )

3. My favourite subject at school is physical _______ . ( educate )

4. Do you know that video games may be _______ ? ( addict )

5. Catching the common cold is ______ for everybody . ( please )

6. My father has a _______ computer . He often brings it with him when he's away on business . ( port )

7. Some of the children _______ boys , play marbles when there is a break . ( main )

8. My sister has a big _______ of stamps . ( collect )

9. I have _______ time to play than my friends . ( little )

10. When my sister and I ( live ) ______ in Hue we ( visit ) _____ a lot of interesting places .

Cho hàm số \(y = f ( x ) = [ x ]\) với x thuộc Q .

a, Tính \(5 ( f ) 4 + 6 f (5\dfrac{1}{6})- 8f(-9,4)\) .

b, Tìm x để \(| f (x) | = 0\)

a, Cho hàm số \(y = f ( x )\) = \((m^2 - 2 )\)\(x^2+2(m^2-1)\) . Tìm m nếu \(f(-2) = 140\)

b, Cho hàm số \(y=h(x)=(n^3-2)x+2(n^3-1)-3\) . Tìm n nếu \(h(3)-2h(1)=11\)