Spelling mistake:

motobikes \(\Rightarrow\) motorbikes

eletric bikes \(\Rightarrow\) electric bikes

Ta thấy nhóm chữ HOC GIOI gồm  chữ cái

\(2222:7=317\) (Dư \(1\) )

Chữ cái thứ 1 của nhóm từ là: H

Vậy chữ cái thứ \(2222\) trong dãy là H

Đáp án: \(5\text{Ω}\)

            _{In recent years, Traffic congestion and pollution have increased significantly and become a major problem worldwide. Some people think that increasing petrol prices will solve such problems. Although it is possible that higher gas prices will solve traffic and pollution problems to a large extent, I completely disagree with this opinion. I believe that increasing the cost of petrol is not a viable solution that everyone can do. Although it can reduce the number of vehicles on the road, it brings many disadvantages or difficulties for people both physically and mentally. Increasing gasoline prices is only a matter of time. Because businesses know in advance, if the world gasoline price increases, they will be compensated by the State (or sooner or later people will also suffer because the State increases the price), and if the world price decreases, They still sell at a high price. People have witnessed too many times when the world gasoline price increases, the domestic gasoline price increases, but the opposite happens very rarely: the world gasoline price decreases while the domestic gasoline price remains stationary. Instead of increasing the price of gasoline. fuel, the government can take a number of other measures to effectively deal with this problem. First, corporate companies whose employees only require a computer to do their jobs should allow them to work from home at least 3-4 days a week. This will reduce the carbon footprint of commuters who go to work every day. Another solution is that governments should create new laws that limit the number of vehicles a household can own. This will limit unnecessary spending on new cars and motorbikes. Both of these solutions can have a positive impact on the environment while discouraging excessive vehicle use. Improving the frequency and reliability of public transport is another way to encourage private car use. A better solution is to find measures that will work in the long run. To illustrate, increased investment in alternative fuels and improved public transport are more effective measures than increasing gasoline prices. Traffic and pollution problems will not be solved until people start using public transport. For this reason, the government should provide cheap public transport and ban cars from the city center. In short, air pollution and traffic problems cannot be solved by increasing spending. fuel costs. Instead, the government should make public transport more reliable and promote work-from-home options to reduce people's need to travel.}

Ý này "Do not burn trees and do not kill trees " em nên viết thành " Do not cut down trees"

 You did it wrong! You should write a paragraph of about 60 to 80 words, not list them out :v

Cho ba cặp NST kí hiệu là Aa;Bb;Dd, tế bào có kiểu NST nào dưới đây là thể ba nhiễm? 

A. AaBbbDd.  B. AaBbDd.  C. AaBDd.  D. ABbDd.

Em tham khảo:Để đánh số trang quyển sách đó, người ta phải viết liên tiếp các số tự nhiên bắt đầu từ 1 thành dãy số.

Dãy số này có:

- 9 số có 1 chữ số

- 90 số có 2 chữ số

Để viết các số này cần số chữ số là

\(\text{9.1 + 90.2 = 189 }\)(chữ số)

Số chữ số còn lại là:

\(\text{450 - 189 = 261}\) (chữ số)

Số chữ số còn lại này dùng để viết tiếp các số có 3 chữ số bắt đầu từ 100. Ta viết được

\(\text{261 : 3 = 87}\) (số)

Số trang quyển sách đó là

\(\text{99 + 87 = 186}\) ( trang)

AC vuông góc với BD thì làm kiểu gì ?

Câu 2

1) Phương trình \(x^2-6x+5=0\) có:

\(a+b+c=1-6+5=0\)

\(\Rightarrow\) Phương trình có hai nghiệm phân biệt \(x_1=1\) và \(x_2=\dfrac{c}{a}=5\)

2) \(\left\{{}\begin{matrix}2\left(x+2\right)=3\left(y-1\right)\\3x+y=6\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2x+4=3y-3\\3x+y=6\end{matrix}\right.\)

\(\Leftrightarrow\left\{{}\begin{matrix}2x-3y=-7\\3x+y=6\end{matrix}\right.\)

\(\Leftrightarrow\left\{{}\begin{matrix}2x-3y=-7\\9x+3y=18\end{matrix}\right.\)

\(\Leftrightarrow\left\{{}\begin{matrix}11x=11\\3x+y=6\end{matrix}\right.\)

\(\Leftrightarrow\left\{{}\begin{matrix}x=1\\3+y=6\end{matrix}\right.\)

\(\Leftrightarrow\left\{{}\begin{matrix}x=1\\y=3\end{matrix}\right.\)