\(x1^2\) - \(x2^2\) = (x1 - x2) * (x1 + x2)

199 ạ

C

Gọi x, y lần lượt là số sản phẩm loại I và loại II được sản xuất ra.

Điều kiện x, y nguyên dương.

Ta có hệ bất phương trình sau: 3x+2y≤180

                                                    x+6y≤220

                                                      x>0 y>0

Tiền lãi trong một tháng của xưởng là T = 0,5x+0,4y (triệu đồng).

Ta thấy T đạt giá trị lớn nhất chỉ có thể tại các điểm A, B, C.

Vì C có tọa độ không nguyên nên loại.

Tại A(60;0) thì T = 30 triệu đồng . Tại B(40:0) thì T = 32 triệu đồng.

Vậy tiền lãi lớn nhất trong một tháng của xưởng là 32 triệu đồng.

A.

1.We use this form when we plan or intend to do something in the future, but there isn’t an exact date or time yet.
→ be going to

2.We use this form when we have organised something and there is an exact date or time.
→ Present continuous

3.We use this form for things which have a fixed timetable.
→ Present simple

4.We use this when we make a prediction about the future.
→ will

D

I would love to visit Tokyo, the bustling capital of Japan. Located on the eastern coast of the country, it offers a blend of modern skyscrapers and traditional temples. The weather is varied, with mild springs, hot summers, and cool winters. Tokyo is famous for its advanced technology, rich culture, and delicious cuisine like sushi and ramen. I want to visit Tokyo to experience its unique mix of tradition and innovation, explore its beautiful parks, and enjoy the vibrant atmosphere of the city.

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