Giúp mk vs ạ, hứa sẽ k đầy đủ cho các bn đúng ạ, gấp!
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1. My hobby is collecting glass bottles.
2. Van's brother usually rides to work.
3. What is her favourite activity.
4. Linh doesn't playing board games.
Viết lại các câu sau
1.I find collecting glass bottles interesting
My hobby is...collecting glass bottles....
2.Van's brother usually goes to work by motorbike
Van'a brother usually rides...motorbike to work...
3.What hobby do you best,Lan?(favorite)
What...is your favorite hobby, lan?...
4.Linh finds playing boarding games boring(doesn't )
Linh......doesn't playing board games........
`9^12` và `26^8`
`9^12 = (9^3)^4 = 27^4`
`26^8 = (26^2)^4 = 676^4`
Do `27^4 < 676^4` nên `9^12 < 26^8`
HT!
Bài 6 :
a ) Từ \(\frac{x}{y}=\frac{6}{5}\)\(\Rightarrow\)\(\frac{x}{6}=\frac{y}{5}\)
Áp dụng tính chất dãy tỉ số bằng nhau ta có :
\(\frac{x}{6}=\frac{y}{5}=\frac{x+y}{6+5}=\frac{121}{11}=11\)
\(\Rightarrow\hept{\begin{cases}\frac{x}{6}=11\\\frac{y}{5}=11\end{cases}}\)\(\Rightarrow\hept{\begin{cases}x=66\\y=55\end{cases}}\)
b ) Từ \(4x=5y\)\(\Rightarrow\)\(\frac{x}{5}=\frac{y}{4}\)
Đặt \(\frac{x}{5}=\frac{y}{4}=k\)
\(\Rightarrow\hept{\begin{cases}x=5k\\y=4k\end{cases}}\)
Thay vào ta có :
\(2.5k-5.4k=40\)
\(10k-20k=40\)
\(-10k=40\)
\(k=-4\)
\(\Rightarrow\hept{\begin{cases}x=5.\left(-4\right)=-20\\y=4.\left(-4\right)=-16\end{cases}}\)
Bạn đợi chút mình làm các phần còn lại cho ạ
c ) Đặt \(\frac{x}{3}=\frac{y}{16}=k\)
\(\Rightarrow\hept{\begin{cases}x=3k\\y=16k\end{cases}}\)
Thay vào ta có :
\(3k.16k=192\)
\(48.k^2=192\)
\(k^2=4\)
\(k^2=2^2\)hoặc \(\left(-2\right)^2\)
\(k=\pm2\)
+ ) Nếu \(k=2\)\(\Rightarrow\hept{\begin{cases}x=3.2=6\\y=16.2=32\end{cases}}\)
+ ) Nếu \(k=-2\)\(\Rightarrow\hept{\begin{cases}x=3.\left(-2\right)=-6\\y=16.\left(-2\right)=-32\end{cases}}\)
d ) Đặt \(\frac{x}{-3}=\frac{y}{7}=k\)
\(\Rightarrow\hept{\begin{cases}x=-3k\\y=7k\end{cases}}\)
Thay vào ta được :
\(\left(-3k\right)^2-\left(7k\right)^2=-360\)
\(\left(-3\right)^2.k^2-7^2.k^2=-360\)
\(9.k^2-49.k^2=-360\)
\(-40.k^2=-360\)
\(k^2=9\)
\(k^2=3^2\)hoặc \(\left(-3\right)^2\)
\(k=\pm3\)
+ ) Nếu \(k=3\)\(\Rightarrow\hept{\begin{cases}x=-3.3=-9\\y=7.3=21\end{cases}}\)
+ ) Nếu \(k=-3\)\(\Rightarrow\hept{\begin{cases}x=-3.\left(-3\right)=9\\y=7.\left(-3\right)=-21\end{cases}}\)
1.I find collecting glass bottles interesting. HObbY
-> Collecting glass bottles is my hobby.
2.Van's brother usually goes to work by motorbike. RIDES
-> Van's brother usually rides his motorbike to work.
3. What hobby do you best, Elina? FAVOURITE
What is your favorite hobby, Elina?
4. Linh finds playing board games boring.
. Linh doesn't interested in playing board games.
5. My sister enjoys arranging flowers. FINDS
. My sister finds arranging flowers enjoyable.
https://www.google.com/search?q=A%3D(-1%2F3)%5E2%3A1%2F6-2*(-1%2F2)%5E3&oq=A%3D(-1%2F3)%5E2%3A1%2F6-2*(-1%2F2)%5E3&aqs=chrome..69i57.197j0j4&sourceid=chrome&ie=UTF-8
https://h7.net/hoi-dap/toan-6/tim-x-biet-2-1-2x-1-3-3-2-1-4-faq373033.html
tham khảo nhé bn
TL
1. carve => carving
2. not goes => doesn`t go
3. take => took
4. interest => is interesting
5. played => will play
^HT^
M3= 82 độ
Đáp án: `M_3 = 82^o`
HT!