Chiều rộng là 105x3/7=45(m)

Chiều dài là 105-45=60(m)

Diện tích là 45x60=2700(m²)

Chiều rộng là

\(105\times\dfrac{3}{7}=45\left(m\right)\)

Chiều dài là

\(\text{105-45=60(m)}\)

Diện tích là

\(\text{45x60=2700(m2)}\)

ktr?

watched / finished / stopped / visited / washed / noticed / waited / divided / recieved / talked / danced / played

1. on - in

2. with - at

3. over - up

4. to

5. out

6. up with 

C

c

c

Ta có: \(3x=4y\Rightarrow\dfrac{x}{4}=\dfrac{y}{3}\Rightarrow\dfrac{x}{20}=\dfrac{y}{15}\)

            \(2y=5z\Rightarrow\dfrac{y}{5}=\dfrac{z}{2}\Rightarrow\dfrac{y}{15}=\dfrac{z}{6}\)

Áp dụng t/c dtsbn:

\(\dfrac{x}{20}=\dfrac{y}{15}=\dfrac{z}{6}=\dfrac{x+z}{20+6}=\dfrac{52}{26}=2\)

\(\Rightarrow\left\{{}\begin{matrix}x=20.2=40\\y=15.2=30\\z=6.2=12\end{matrix}\right.\)

Hứa Tick

a: \(\Leftrightarrow\left(3x-1\right)^4\cdot\left(3x-2\right)\cdot3x=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{3}\\x=\dfrac{2}{3}\\x=0\end{matrix}\right.\)

=2+2+...+2+613

=613+32

=645

50%

\(50\%\)

50%