x=y=z=2

Dear Anna,

I'm glad that you like the cooking book. It has many interesting recipes in there, you should try one. By the way, Sunday sounds great, I'll come over at 4 p.m. 

See you soon,

     Linda

Hi Anna,

I'm glad that you're finding my book on healthy cooking helpful.

I am delighted to join you at your home this Sunday to find out some recipes from the book with you.

Unfortunately, my mango trees has not produced any mangoes at the time, but by the way I will buy some fresh mangoes from the market on the way to your place for one of the dishes.

Looking forward to seeing you soon.

Warm regards.

Linda.

Đổi 1kg = 1000 g.

a) Tổng số tiền mẹ đưa cho Trang là:

         50 000 x 2 + 20 000 + 5 000 = 125 000 ( đồng )

    Số tiền mua thịt bò là:

         300 000 : 1000 x 300 = 90 000 ( đồng )

     Số tiền mua bông cải xanh là:

          30 000 : 1000 x 500 = 15 000 ( đồng )

     Tổng số tiền mua hàng là:

           90 000 + 15 000 + 5 000 = 110 000 ( đồng )

       Vì 110 000 < 125 000 nên ⇒ Bạn Trang đủ tiền mua hàng.

   b) Số tiền bạn Trang cầm về là:

          125 000 - 110 000 = 15 000 ( đồng )

       Nhưng cửa hàng lại không có mệnh giá tiền dưới 10 000 đồng, nên cửa hàng chắc chắn phải đi đổi tiền.

      Bạn Trang sẽ cầm về những mệnh giá tiền là : 1 tờ 10 000 đồng và 1 tờ 5 000 đồng.

    Bạn Trang sẽ cầm về những mệnh giá tiền là : 1 tờ 10 000 đồng và 1 tờ 5 000 đồng.

KHOAN ĐỀ NÀY VỪA THI HÔM NGÀY 9/6/2023 Ở TỈNH MÌNH =))

HD:

Coi bài là 2 chuyển động ngược chiều gặp nhau

Ngày hôm trước là vật chuyển động 1 và ngày hôm sau là vật chuyển động 2

Dạ vâng

Vâng cô

My favorite hobby is playing badminton. I started about 2 years ago. I play badminton with my father everyday afternoon. I always play badminton at home. I think it is a sport very good for our health.

My favorite hobby is playing football. I started playing in the summer 2 years ago. I play football with my friends every afternoon. We always play football at home. I think it is a very good sport for our health.

Living in the countryside is very unique. Although many people think that the country is not good or not well-provided, it's still one of the best options for healthy living. In the countryside, first, it's the low cost of living. Secondly, unlike the cities, the country provides fresh air and green spaces. Last but not least, the villagers are always kind and friendly, willing to help each other no matter what.

Some people really prefer to live in the downtown because of its facilities. But I prefer to live in the countryside because of many reasons.

First of all, the life in the city makes me uncomfortable, I cannot bear to live in cramped conditions with the hustles and bustles. We do not have fresh air to breathe, do not have a space for our children to play and for us to relax. It is really tiring and upset to wait for hours because of traffic jams.

Secondly, the pollution because of smogs and dusts and noise can make me feel sick. Moreover, I do not feel safe to live in the city because the criminal situations are rising. , We feel worried when we go out each time.

Thirdly, Nowadays, the conditions of the countryside are better and better, the gap between the cities and the countryside is narrowed day by day.

I love the silence, I love fresh air. I love the good relationships of people. so I love to live in countryside.

b) Xét phương trình 2 có 
(1-x² )/(1+xy)² - (x+y)²    - y² =1
=>(1-x²)/1+2xy+x²y²-x²-2xy-y²   -y²=1
=>(1-x²) /(1-x² )-y²(1-x²)       -y² =1
=>(1-x²)/(1-x²)(1-y²)       -y²=1
=>1/(1-y²)    -y²=1
=>1=(1-y²)²
=>1=1-2y²+y4
=>y⁴-2y²=0
=>y²(y²-2)=0
=>y=0
y²-2=0
=> y=+√2
=> y=-√2
 Thay y vào phương trình 1 là ra x 

à nhầm ... sửa lại dòng 6 
=> 1/(1-y²) - y²=1
=> 1/(1-y²)=1+y²
=> 1=1-y⁴
=> y=0
=>x=3
=> x=-3
 

Câu 1 \(k\) chạy từ 2 nhé, mình quên.

câm mồm vào thằng nhóc