Bài 5. a) Tính tổng S = 2 + (-4) + 6 + (-8) + ... + 2018 + (-2020) b) Tính giá trị của biểu thức: ax – ay + bx – by với a + b = 25 , x – y = - 4

Chứng minh 2.x^2-20x+100>0 với mọi x

ai giải jup mình với mình cảm ơn

Giải hộ mk bài 4,5 nhà Mk cảm ơn

viết cho mình những bài này nhé 1 children nowadays play games online and often use smart phone as leisure activities .What do you think about it? 2 what are the drawbacks of city life? 3 think about the future means of transport. 4 how have the roles of mother and father in society changed 5 what should we do to reduce teen strees and pressure CÁM ƠN NHÌU ĐÁNH GIÁ 5* CHO

Trả lời hộ cái (có 5 câu mà). Hỏi 3 lần r :( *Use the words given and other words, complete the second sentence so that it has a similar meaning to the first sentence. Do not change the word given. (Use 2 - 5 words in total). Example: 0. My house has a small garden. is |=> There (is a small garden) in the house. 1. I like pop music but my brother likes rock music. diffrent |=> Mt taste in music __________ my brother's. 2. Neither Mary nor her sister studied arts at school. either |=> Mary never studied arts at school and _________. 3. I think Vinh acted better than Quang in that play. as |=> I think Quang didn't __________ Vinh in that play. 4. Bith Anna and her brother are fond of watching water puppet. too |=> Anna is fond of watching water puppet and __________. 5. My hobby is drawing and John's hobby is also drawing. same |=> My hobby __________ John's hobby

Bài 2. Điền dấu “X” vào ô “Đúng” hoặc “Sai” cho thích hợp: Câu Nội dung Đúng Sai 1 Tổng hai số nguyên khác dấu là một số nguyên dương ...... 2 Tổng hai số nguyên âm là một số nguyên âm....... 3 Tích hai số nguyên trái dấu là một số nguyên âm...... 4 Các số 1 và -1 là ước của mọi số nguyên...... bai ez thui nhung mik thich ra de

tìm các số tự nhiên a,b,c khác nhau và khác 0 thỏa mãn abbc=7*ab*ac ai giúp với đúng mk cho ctlhn nha

Trả lời hộ cái (có 5 câu mà). Hỏi 3 lần r :( *Use the words given and other words, complete the second sentence so that it has a similar meaning to the first sentence. Do not change the word given. (Use 2 - 5 words in total). Example: 0. My house has a small garden. is |=> There (is a small garden) in the house. 1. I like pop music but my brother likes rock music. diffrent |=> Mt taste in music __________ my brother's. 2. Neither Mary nor her sister studied arts at school. either |=> Mary never studied arts at school and _________. 3. I think Vinh acted better than Quang in that play. as |=> I think Quang didn't __________ Vinh in that play. 4. Bith Anna and her brother are fond of watching water puppet. too |=> Anna is fond of watching water puppet and __________. 5. My hobby is drawing and John's hobby is also drawing. same |=> My hobby __________ John's hobby

Ai giải chị tiết giúp em với ạ .