Giải

Vì:

0,6 x -3/4 = -9/20

0,6 x 16 = 48/5

0,6 x (-20) = -12

-3/4 x 16 = -12

-3/4 x (-20) = 15

16 x (-20) = - 720

Nên:

0,6 x (-20) = (-3/4) x 16

Ta có các tỉ lệ thức:

0,6/(-3/4) = 16/(-20)

0,6/16 = (-3/4)/ (-20)

(-20)/(-3/4) = 16/(0,6)

(-20)/16 = (-3/4)/0,6

Chầu chực chứ không phải là trầu trực

Chọn C

em cảm ơn cô ạ

(1+567) x 567 /2

Ta có công thức tính tổng của dãy số tự nhiên từ 1 đến n:

S=\frac{n\cdot (n+1)}{2}

Với n=567:

S=\frac{567\cdot (567+1)}{2}=\frac{567\cdot 568}{2}

S=567\cdot 284=161,148

Vậy:

1+2+3+\ldots +567=161,148

• Danny collects tropical fish.
• There is a giant aquarium / shelving around his bedroom wall.
• His first fish is a goldfish.
• An angelfish eats small insects and crustaceans (or flake food).
• Danny had five tanks when he was eleven.
• Danny went to the Amazon / Australia for his holiday.
• Danny wants to keep one or two small sharks.
• Danny has never fed the sharks because he is frightened / scared.

1. Danny collects fish.

2. There is a big fish tank around his bedroom wall.

3. His first fish is a goldfish.

4. An angle fish eats other smaller fish.

5. Danny had a small fish tank when he was eleven.

6. Danny went to Nha Trang for his holiday.

7. Danny wants to keep one or two small sharks.

8. Danny has never fed the sharks because he is afraid of them.

cho mik xin tick

3^21 = 3^20.3 = (3^2)^10.3 = 9^10.3

2^31 = 2^30.2 = (2^3)^10.2 = 8^10.2

9^10 > 8^10

3> 2

nhân vế với vế ta có:

9^10.3 > 8^10.2

Vậy 3^21 > 2^31

Đây nhé bạn<3

\(x=-\frac{3}{2}-\frac{1}{6}\)

\(-\frac{3}{2}\): \(-\frac{3}{2}=-\frac{3\times 3}{2\times 3}=-\frac{9}{6}\) 

\(x=-\frac{9}{6}-\frac{1}{6}\)\(x=\frac{-9-1}{6}\)\(x=-\frac{10}{6}\)

\(x=-\frac{10\div 2}{6\div 2}=-\frac{5}{3}\)

\(\frac{x+1}{6}=-\frac32\Rightarrow2\cdot\left(x+1\right)=\left(-3\right)\cdot6\)

\(\Rightarrow2x+2=-18\Rightarrow2x=-20\Rightarrow x=-10\)

Đề bài là gì thế em

9,02394389204x10^99

đâu,tao thấy dễ ầ mày

`a=4/3`

`=>A=3a+2=3.(4/3)+2=4+2=6`

Thay \(a=\frac43\) vào A = 3a + 2, ta được:
A = \(3\cdot\frac43+2=4+2=6\)