một người đạp xe trên quãng đường ab. 1/3 quãng đường đầu với 20km/h 1/3 quãng đường sau với 15km/h và 1/3 quãng đường cuối vs 5km/h tính v trung bình trên cả quãng đường ab

Cho x, y là hai số dương thoả mãn $x^{4}$ + $x^{2}$ + x = $y^{4}$ + $y^{2}$ + y. Tính giá trị biểu thức K= $\frac{$x^{2021}$+2021.$y^{2021}$}{$x^{2021}$}$

calli : tạm biệt NL : chuẩn bị bỏ hoidap

Vẽ pic dưới giống đến 99,999% nha có màu và ko dùng app. Vẽ đẹp hộ mk và làm đúng theo yêu cầu vì mk sẽ ko thông cảm đâu, Mk cảm ơn

VI. Read the following passage and answer the questions. As a result of years of research, we know that too much animal fat is bad for our health. For example, American eat a lot of meat and only a small amount of grains, fruit and vegetables. Because of their diet, they have high rates of cancer and heart disease. In Japan, in contrast, people eat large amounts of grains and very little meat. The Japanese also have low rates of cancer and heart disease. In fact the Japanese live longer than anyone else in the world. Unfortunately, when people move to the US, the rates of heart disease and cancer increase as their diet changes. Moreover, as hamburgers, ice-cream, and other high fat food become popular in Japan, the rates of heart disease and cancer are increasing there as well. People are also eating more meat and dairy products in other countries such as Cuba and Hungary. Not surprisingly, the disease rates in these countries are increasing along with the change in diet. Consequently, doctors everywhere advise people to eat more grains, fruit and vegetables and to eat less meat and fewer dairy products. 1. Why do American have high rates of cancer and heart disease? 2. Do the Japanese live longer than anyone else in the world? 3. In which countries are people also eating more meat and dairy products? 4. What do doctors everywhere advise people?

3. His father asked him to go stay at home because he was sick. => Because of................................................................................. => Because of ........................................................................................ 4. She failed the University entrance exam because her grades were bad. => Because of................................................................... => Because of ......................................................................................... 5. Because I studied hard, I passed the exam. => Because of................................................................... 6. She can’t work hard because she is very old. . => Because of.................................................................................................... . => Because of................................................................................................... 7 . He couldn’t go to school because he was very poor. =>. Because of....................................................................................................... . => Because of...................................................................................................... 8. I can’t buy this bike because I don’t have enough money. . => Because of......................................................................................................

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Calli: "you are so cute." P/s: Hôm nay sinh nhật mình và mình sẽ đóng góp cho CĐ hoidap nhìu câu buff hơn <3