a) 834 × 57 = 47 538
b) 603 × 295 = 177 885

nhé bạn ( pls tick me )

.. là j vậy tôi ko hiểu

Topic 2 (Sport or game you enjoy)

Chủ đề: Chess

My favorite game is chess. It is a strategic board game for two players that requires deep concentration. I often play it with my friends at the university club to relax. I love calculating the best moves to checkmate the opponent's King. Playing chess helps me improve my memory and logical thinking effectively.

Topic 3 (Email about a holiday)

Chủ đề: Kỳ nghỉ ở Đà Lạt

Subject: My holiday in Da Lat

Hi Nam,

How are you? I am writing to tell you about my trip to Da Lat. It is wonderful here! The weather is cool and fresh. Yesterday, I visited Xuan Huong Lake and bought some strawberries. The local food is delicious. I will return home this Sunday.

Best, An

1. Did they watch the football match on television last weekend?

2. People mustn’t throw trash in the park to keep it clean.

1. Did they watch the football match on television last weekend?

2. People mustn't throw the trash in the park to keep it clean

1. These sports shoes are theirs.

2. Because the movie Frozen was funny, the children laughed a lot.

3. Phong’s favourite sport is basketball.

1. These sports shoes are theirs

2. Because the movie Frozen was funny so the children laughed a lot

3. Phong's favourite sport is basketball

3xy - 2x - 2y = 5

⇒ 9xy - 6x - 6y = 15

⇒ 3x(3y - 2) - 2(3y - 2) - 4 = 15

(3x - 2)(3y - 2) = 19 = 1*19=19*1=(-1)*(-19)=(-19)*(-1)

trường hợp 1: x = 1, y = 19 (thoả mãn)

3x - 2 = 1 ⇒ x = 1

3y - 2 = 19 ⇒ y = 7

trường hợp 2: x = 19, y = 1 (thoả mãn)

3x - 2 = 19 ⇒ x = 7

3y - 2 = 1 ⇒ y = 1

trường hợp 3: x = -1, y = -19 (không thoả mãn)

3x - 2 = -19 ⇒ x = 1/3

3y - 2 = -1 ⇒ y = -17/3

trường hợp 4: x = -19, y = -1 (không thoả mãn)

3x - 2 = -19 ⇒ x = -17/3

3y - 2 = -1 ⇒ y = 1/3

vậy (x; y) = (1; 7) hoặc (7; 1)

$25\cdot 5^3 : 1^{625}\cdot 5^3$
$= 25\cdot 5^3 : 1\cdot 5^3$
$= \dfrac{25\cdot 5^3}{5^3}$
$= 25$

chắc đúng ko ạ

Nhũ tương là hỗn hợp của các giọt chất lỏng nhỏ li ti phân tán trong một chất lỏng

1,o000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Để bảo quản thịt cá tươi ngon trong một tuần, phương pháp tối ưu nhất là cấp đông ở nhiệt độ \(\le -18^{\circ }C\). Quy trình bao gồm: rửa sạch, thấm khô, chia nhỏ theo khẩu phần, bọc kín (túi hút chân không hoặc hộp kín) để ngăn nhiễm khuẩn và mất nước, sau đó ghi ngày bảo quản trước khi cho vào ngăn đông. 

a) \(\frac{38}{45}-\left(\frac{8}{45}-\frac{17}{51}-\frac{3}{11}\right)\)
\(=\frac{38}{15}-\frac{8}{45}+\frac{17}{51}=\frac{3}{11}\)
\(=\left(\frac{38}{45}-\frac{8}{45}\right)+\frac13+\frac{3}{11}\)

\(=\frac23+\frac13+\frac{3}{11}\)
= 1 + \(\frac{3}{11}\) = \(\frac{14}{11}\)
b) \(\left(\frac13+\frac{12}{67}+\frac{13}{41}\right)-\left(\frac{79}{67}-\frac{28}{41}\right)\)

\(=\frac13+\frac{12}{67}+\frac{13}{41}-\frac{71}{67}+\frac{28}{41}\)
\(=\frac13+\left(\frac{-79}{67}+\frac{12}{67}\right)+\left(\frac{13}{41}+\frac{28}{41}\right)\)
\(=\frac13+\left(-1\right)+1\)
= \(\frac13\)

38/45 - (8/45 - 17/51 - 3/11)

= 38/45 - 8/45 + 17/51 + 3/11

= (38/45 - 8/45) + 1/3 + 3/11

= 2/3 + 1/3 + 3/11

= 1 + 3/11

= 11/11 + 3/11

= 14/11

• a) \(- 5 \frac{5}{7}\)
• b) \(- 2 \frac{4}{9}\)
• c) \(- 5 \frac{3}{8}\)

Câu a:

\(\frac{-40}{7}\) = - 5\(\frac57\)

Câu b:

\(\frac{-22}{9}\) = - 2\(\frac49\)

Câu c:

\(\frac{43}{-8}\) = - \(\frac{43}{8}\) = -6\(\frac18\)