Một trường có 3 lớp 6 biết $\frac{2}{3}$ số học sinh lớp 6A bằng số học sinh của lớp 6B và bằng $\frac{4}{5}$ số học sinh lớp 6C .Lớp 6C có số học sinh ít hơn tổng số học sinh 2 lớp kia là 57 học sinh .Tính số học sinh mỗi lớp.

làm nhanh giúp em với ạ em cảm ơn

rút gọn A = 1 + a[(a + 1)^9 + (a + 1)^8 + (a + 1)^7 + …+ (a + 1)^2 + a + 2].

cho tam giác ABC có góc C= góc 2A+góc B và góc B> góc A.cmr: AB²=BC²+AB.AC

Giúp mình với nhanh nha Một khối nước đá có khối lượng 5kg ở nhiệt độ -20°C được thả vào một bình đồng có khối lượng 0,2kg chứa 2kg nước ở nhiệt độ 10°C. Tính nhiệt độ sau cùng và thể tích nước trong bình khi có cân bằng nhiệt, bỏ qua hao phí nhiệt. Thanks

Giúp mình bài này nha thank mn nhiều

de bai:rewrite each sentence so that it contains the work os works in capitals and so that the meaning stays the game. 9,They susoended Jackson for the next two matches (BANNED) 10,Plaese come this way,and you'll see if Mr.Francis is in (WILL) Giup mik nha

giúp mik với !!! VII.Rewrite the following sentences so that their meanings stay the same 1.John was too ill to go to school. - John wasn’t ......................................................................................................... 2. Tom is not as tall as Peter. - Peter ...................................................................................................................... 3.The player kicked the ball into the goal . - The ball……………………………………………............................................ 4.Shall I sit here ? -Do you mind if I ……………………………........................................................? 5.It is a contest in which participants have to cook rice. - It’s a…………………………………………....................................................... 6.People play football all over the world. - Football…………………………………….......................................................... 7.The front yard is too small to play soccer in. -The front yard isn’t ................................................................................................. 8.She started to live in Hanoi 2 years ago. -She.......................................................................................................................... 9.He began to study English when he was young. (since) - He....................................................................................................................

Read the passage and fill in the blanks with the given words in the box. (surprising, that, tool, down, rely, shape, home, because, which, being) Bau Truc pottery village of Cham village ethnic minority is one of the oldest pottery villages in Southeast Asia. It‟s located about 10 km in the South of Phan Rang town. The small village is (1)_____ to more than 400 families, of (2)_____ 85% are in the traditional pottery business. The style is said to be handed (3)_____ from Po Klong Chan, one of their ancestors from the immemorial time. People in Bau Truc use their skillful hands, bamboo-made circles and shells to create priceless works. It is (4)_____ that while the Kinh people have switched to using wheel as an indispensable (5)_____ , their Cham counterparts, on the contrary, still (6)_____ on talent hands and simple tools. To create a pottery product, a Cham craftsman only needs an anvil, not a potter‟s wheel, and other simple equipment and moulds and then uses hands to (7)_____ pieces of clay into the works he wants. The clay is taken is taken from the banks of the Quao River and is flexible, durable when (8)_____ fired. The skills needed to mix sand with the clay are also various. The amount of sand mixed with the plastic material is dependent on what the pottery used for and the sizes. For these seasons, Bau Truc pottery is quite different from pottery elsewhere. For example, water jars made in Bau truc pottery are always favoured by people in dry and sunny areas (9)_____ the temperature of the water in the jars is always one centigrade cooler than (10)_____ outside.

1 ng đi xe máy từ A-B với V=30km/h,20 phút sau ng thứ 2 cx đi từ A-B với V=36 km/h và đến B sau ng thứ nhất 5 phút. Chiều dài AB?