x =578\(\frac{\hept{\begin{cases}4\\4\\5\end{cases}}}{46}\)nha

Áp dụng dãy tỉ số bằng nhau ta có:

\(\frac{x}{4}=\frac{x}{3}=\frac{z}{9}=\frac{x-3y+4z}{4-3.3+4.9}=\frac{62}{31}=2\)

\(\frac{x}{4}=2\Rightarrow x=2.4=8\)

\(\frac{y}{3}=4\Rightarrow y=3.4=12\)

\(\frac{z}{9}=4\Rightarrow z=4.9=36\)

Áp dụng tính chất dãy tỉ số bằng nhau ta có : 

\(\frac{x}{4}=\frac{y}{3}=\frac{z}{9}=\frac{x-3y+4z}{4-9+36}=\frac{62}{31}=2\)

\(x=9;y=6;z=18\)

 You’ll have (wait) ……to.wait......till he stops (talk) ……talking………….    

It’s no use (try) …trying…………….. (interrupt)(ngắt lời) ……to interrupt……… him. You’ll have (wait) to wait

till he stops (talk) ​talking.       

Hc tốt

ta có :

\(\left(-\frac{7}{5}\right)^n:\left(-\frac{7}{5}\right)^{n-1}=\left(-\frac{7}{5}\right)^{n-\left(n-1\right)}=\left(-\frac{7}{5}\right)^1=-\frac{7}{5}\)

\(\left(-\frac{1}{3}\right)^{2n}:\left(-\frac{1}{3}\right)^n=\left(-\frac{1}{3}\right)^{2n-n}=\left(-\frac{1}{3}\right)^n\)

x=46 nha

ghi rõ giupd e vs

a)\(\frac{2}{3}x=-\frac{4}{27}\)

\(\Leftrightarrow x=-\frac{4}{27}:\frac{2}{3}\)

\(\Leftrightarrow x=-\frac{2}{9}\)

b)\(-1\frac{3}{5}x=1\frac{1}{15}\)

\(\Leftrightarrow-\frac{2}{5}x=\frac{16}{15}\)

\(\Leftrightarrow x=-\frac{8}{3}\)

#H

ac=11

Tham khảo ạ!

Thấy hình ko ạ?

Cre : Lazi

\(1.\left(2x^2y\right)\left(-3xyz^2\right)\left(5x^2y^2z^2\right)^2\)

\(\Leftrightarrow-2x^2y\times3xyz^2\left(5x^2y^2z^2\right)^2\)

\(\Leftrightarrow-2x^2y\times3xyz^2\times25x^4y^4z^4\)

\(\Leftrightarrow-150x^7y^6z^6\)

                                                                PS: nhớ k :3

                                                                                                                                                             # Aeri # 

\(C=\frac{-3}{5}.\frac{0,2}{1,35}.\frac{-0,007}{1,4}.\frac{250}{3}.\frac{27}{10}=\frac{-3}{5}.\frac{20}{135}.\frac{-7}{1400}.\frac{250}{3}.\frac{27}{10}\)

\(=\frac{-2}{5}.\frac{4}{5.9}.\frac{-1}{200}.\frac{250}{3}.\frac{27}{10}=\frac{2.4.250.27}{5.9.5.200.3.10}=\frac{4}{25}\)

\(\frac{4}{25}\)nha

Trả lời :

will see - see - will have graduated

~~Học tốt~~

Trả lời:

will see

see

will have graduated