1/ bình định

2/ gia lai

3/ hải dương

We are visiting Ha Long Bay next week.

Ta thấy: 15a+50b=2014

=> 5.(3a+10b)=2014

Vì 5.(3a+10b) chia hết cho 5

=>2014 chia hết cho 5

mà 2014 không chia hết cho 5

=>vô lí.

Vậy không tồn tại a,b thoả mãn đề bài.

số hs giỏi năm sau là

12+5=17(hs)

số quyển vở phải mua là

17x10=170(quyển)

ĐS:170 quyển vở

1.There are some apples on the table.

There aren't any apples on the table

Are there any apples on the table?

1.There is some meat on the plate.

There isn't any meat on the plate

Is there any meat on the plate?

3.There are some noodles.

There aren't any noodles

Are there any noodles?

4.There is some tea in the teapot.

There isn't any tea in the teapot

Is there any tea in the tapot?

5.There is some fruit in the fridge.

There isn't any fruit in the fridge.

Is there any fruit in the fridge?

6.There are some oranges and bananas

There aren't any oranges and bananas.

Are there any oranges and bananas?

7.There is some milk for breakfast.

There isn't any milk for breakfast.

Is there any milk for breakfast?

8.There are some vegetables for lunch.

There aren't any vegetables for lunch.

Are ther any vegetables for lunch?

hoặc practises

practices

Why does thia person look like me?