Ai giúp tui với mai tui cần rùi:((

`Tìm\ x:` `100.(x-80) = 10000-8000`

Cho dãy số: 36; 45; 54; .......... Số thứ 20 của dãy số trên là số nào?

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Giải chi tiết mỗi phần giúp em ạ. Em cảm ơn !

Giúp em ạ, toán 11 em cần gấp 50điểm em vote 5s ạ

hum nay là một ngày bùn các bn vẽ anime càng bùn càng tốt

Chứng minh biểu thức sau khác 0

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Read the following passage and choose the best answers to each of the questions below. Alexander Graham Bell was born in 1847 in Edinburgh, Scotland. His father was an expert in phonetics, the study of the sounds of languages. As a boy, Bell became interested in sounds and speech. In 1870 the Bells decided to emigrate to America. They lived in Boston, where Alexander taught in a school for the deaf. There he began experimenting with a machine to help the deaf hear. While experimenting with this machine, Bell had an idea. Why not use electricity to send the human voice from one place to another? Bell began work on a new invention. expert (n): chuyên gia 36. When was Alexander G. Bell born? A. In 1847 B. In 1870 C. In 1870s D. no information 37. He went to live _______ . A. in Scotland B. in America C. in Boston D. b & c are correct 38. What does the word ‘emigrate’ in line 3 mean? A. leave somebody’s country to live in another country B. to go to a place for a short time C. travel a long way from home to work every day D. get away from something dangerous 39. What does the word ‘they’ in line 3 refer to? A. sounds B. the Bells C. the American D. the deaf. 40. Which of the following is not true? A. Bell’s father was an expert in phonetics. B. Bell became interested in sounds and speech since he was a boy. C. Bell learned in a school for the deaf. D. He experimented a machine to help the deaf hear.