Bài tập : Giải các hệ pt
a/ x+y = 4 và x^2*y + y^2*x = 12
b/ 2x+y=1 và 3x^2 - y^2 - xy +2x - 3y +14=0

Giải các hệ pt
a/ x+y = 4 và x^2*y + y^2*x = 12
b/ 2x+y=1 và 3x^2 - y^2 - xy +2x - 3y +14=0

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 43.

One of the seven wonders of the ancient world, the Great Pyramid of Giza was a monument of wisdom and prophecy built as a tomb for Pharaoh Cheops in 2720 B.C. Despite its antiquity, certain aspects of its construction makes it one of the truly wonders of the world. The thirteen- acre structure near the Nile river is a solid mass of stone blocks covered with limestone. Inside are the number of hidden passageways and the burial chamber of the Pharaoh. It is the largest single structure in the world. The four sides of the pyramid are aligned almost exactly on true north, south, east and west-an incredible engineering feat. The ancient Egyptians were sun worshippers and great astronomers, so computations for the Great Pyramid were based on astronomical observations.

Explorations and detailed examinations of the base of the structure reveal many intersecting lines. Further scientific study indicates that these represent a type of timeline of events - past, present and future. Many of the events have been interpreted and found to coincide with known facts of the past. Others are prophesied for future generations and are currently under investigation. Many believe that pyramids have supernatural powers and this one is no exception. Some researchers even associate it with extraterrestrial beings of ancient past.

Was this superstructure made by ordinary beings, or one built by a race far superior to any known today?

The word 'feat’ in the first paragraph is closet in meaning to _______.

A. accomplishment

B. festivity

C. appendage

D. structure

Tìm số tự nhiên x biết:

a) x   -   32 : 16   =   48                   b)  88 - 3 . 7 + x = 64

c) 5 + 4 x : 3 - 121 : 11 = 4               d)  15 - 2 3 x + 1 = 11 . 13 - 130

Give the correct form of the word.

What do you think about this TV show? – It is very (entertain)…….

Mục đích của Pháp phát triển giao thông vận tải trong cuộc khai thác lần thứ hai là

A. chuyên chở vật liệu và lưu thông hàng hóa thuận lợi.

B. mở mang hệ thống đường sá Việt Nam ngang tầm thế giới.

C. giải quyết nạn thất nghiệp ở Việt Nam.

D. phục vụ cho công cuộc khai thác thuộc địa.

Choose the letter A, B, C or D to complete the sentences

My grandpa's attitudes are very _______, considering his age.

A. modern

B. modernity

C. modernize

D. modernization

Lăng kính là một khối chất trong suốt và thường có dạng hình học gì?

A. Hình lục lăng.

B. Hình cầu.

C. Hình trụ tròn.

D. Lăng trụ tam giác.

Tìm mốt của dấu hiệu

A.  M 0 = 35

B.  M 0 = 34

C.  M 0 = 36

D.  M 0 = 33