Mở tủ lạnh đầu tiên!!!!

tk mik nhé bạn thân

kb lun nhé

VÌ Chiều rộng bằng 3/5 chiều dài nên ta chia hình chữ nhật thành 3 x 5 = 15 ( phần = nhau ) 

ta có hình vẽ

diện tích của mỗi hình vuông nhỏ là : 

540 : 15 = 36 ( m2 )

vì 36 = 6x6 nên cạnh hình vuông là 6 m

chiều rộng HCN là :  6x3=18 ( m ) 

chiều dài HCN là : 6x5=30 ( m )

chu vi : ( 18 + 30 ) x 2 = 96 ( m )

 Đ/S : 96m

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Chiều rộng khu vườn đó là :120:15=8m

Chu vi khu vườn đó là: (15+8)x2=46m

đổi: 46m =4600cm

số cột rào đã đóng được là: 4600:50=92 cột rào

nếu 1 bằng 58 thì 2 sẽ bằng :

  58 x 2 = 116

           đáp số : 116

k mình nhé

chúc bạn học giỏi

a=200

b=107,82

c=12570

d=11

thank you

a) \(x\)x 3 x 5 = 2,7

   \(x\)            = 2,7 : 5 : 3

   \(x\)            = 0,18

b) 1,2 : \(x\)x 4 = 20

    1,2 : \(x\)     = 20 : 4

    1,2 : \(x\)     = 5

            \(x\)    = 1,2 : 5

            \(x\)    = 0,24

\(2x\left(x-3\right)+5\left(x-3\right)=0\)

\(\Leftrightarrow\left(x-3\right)\left(2x+5\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x-3=0\\2x+5=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=3\\x=\frac{-5}{2}\end{matrix}\right.\)

Cảm ơn bạn nhé