Cho hai đường thẳng y=-x+2 và y=2x+(3-k) tìm k để hai đường thẳng cắt nhau tại một điểm thuộc trực hoành

Mọi người giúp mình câu 42-50 với ạ

Các sư phụ giỏi tiếng anh giúp e 8 câu này vs 1.People have been inventing things for years. Paper was invented about 2,000 years ago. The wheel was invented more than 5,000 years ago. What would life be like without paper to write on or bikes to ride? Those inventions have made life easier. Airplane The Wright Brothers invented the first airplane in December 1903. That makes 2003 the 100th anniversary ! Before the airplane was invented, most people traveled by cars, boats, and trains. Today, airplanes help people travel faster. How do airplanes help you? Telephone Alexander Graham Bell invented the telephone in 1876. Before the telephone was invented, people kept in touch by writing letters or talking in person. Today the telephone makes it easier for people to talk to one another. How do telephones help you? Automobile The first four-wheeled gas-powered car was invented by Karl Benz in 1891. Before people had cars, they couldn’t travel easily. They walked or rode horses for short trips. They took trains or boats for long trips. Today cars are one of the main ways people travel. How do cars help you? Computer People worked for years to make the first computer. It was built in 1946. The first computer was called ENIAC. Today computers are an important part of many people’s lives. People use computers as tools to write, get information, and much more. How do computers help you? Question 20. What does the word anniversary in the second paragraph most nearly mean? A: an event B: a statement of fact C: a celebrate date D: an interesting idea Question 2. “You’d better learn harder for the final exam, Peter”, Daisy said. A: Daisy insisted Peter to learn harder for the final exam. B: Daisy ordered Peter to learn harder for the final exam. C: Daisy advised Peter to learn harder for the final exam. D: Peter invited Peter to learn harder for the final exam. Question 3.(baì đọ tương tự câu 1) Which of the followings are two inventions in the passage that were invented before 1900? A: the airplane and the telephone B: the car and the computer C: the computer and the airplane D: the telephone and the car Question 4. “I didn’t say anything at the meeting last week.” Minh said. A: Minh told that he hadn’t said anything at the meeting previous week. B: Minh told that he hadn’t said anything at the meeting last week. C: Minh told that he didn’t say anything at the meeting the previous week. D: Minh told that he hadn’t said anything at the meeting the previous week. Question 5.(baì đọ tương tự câu 1) The primary purpose of this passage is to describe ________. A: some inventions that have made a big difference. B: the invention of the airplane in December 1903. C: the reasons why Karl Benz invented the gas-powered car. D: some ways that computers help to make our lives easier. Question 6:Paul: “Mary will help the teacher do the experiment”. Tom: “_____” A: Can you hear? B: Are you certain? C: Do you understand? D: What did you know? Question 7. I can’t come to your party next Friday as I _____ on that day. A: works B: have worked C: will be working D: work Question 8. My friend said he really enjoyed doing _____experiments. A: scientifically B: science C: scientific D: scientist

Cái này làm sao v mn giúp mình với

Tính độ dài cạnh đáy của hình tam giác có chiều cao là 2/5m và diện tích là 1200m2

v) $\frac{x}{2012}$ + $\frac{x+1}{2013}$ + $\frac{x+2}{2014}$ + $\frac{x+3}{2015}$ + $\frac{x+4}{2016}$ = 5

Một hình tròn có đường kính 5 dm. Tính chu vi và diện tích hình tròn đó?

Giải dùm mình với lần đàu sai ỷang này mong ae giúp đỡ

trong mot duong tron goc noi tiep chan nua duong tron la A goc nhon B goc bet C goc vuong D goc tu

Xác định khởi ngữ trong câu 1. Ăn , tôi cũng ăn rồi , bài tập tôi đã làm rồi , sao anh không cho tôi xem phim chứ? 2. Xây cái lăng ấy , cả làng phục dịch , cả làng gánh gạch , đập đá , làm phu hồ cho nó 3. Cái cổng đằng trước , mở thì cũng mở được ấy , nhưng mở ra cũng chẳng ích gì. 4.Ông giáo ấy , thuốc không hút , rượu không uống . 5. Còn mắt tôi thì các anh lái xe bảo: "Cô có cái mắt nhìn xa xăm". 6. Về chí thông minh thì nó là nhất. 7. Đối với cháu , thật là đột ngột. 8. Vâng . Ông giáo dạy phải! Đối với chúng mình thế là sung sướng. 9. Ông cứ đứng vờ cờ xem tranh ảnh chờ người khác đọc thì nghe lỏm . Điều này làm ông khổ tâm hết sức. 10. Chuyện của Linh, tôi đã biết rồi. 11. Thương thì thương nhưng tôi cho nó vào trường cái nghiện bác à!