Hệphương trình nào sau đây có vô sốnghiệm? A. { 𝒙−𝟐𝒚=𝟏 𝟔𝒙+𝟒𝒚=−𝟐 B. {𝟑𝒙−𝟐𝒚=𝟐 𝟔𝒙−𝟒𝒚=−𝟒 C. {𝟔𝒙−𝟒𝒚=𝟐 𝟔𝒙+𝟒𝒚=−𝟐 D. {𝟑𝒙−𝟐𝒚=−𝟏 𝟔𝒙−𝟒𝒚=−𝟐

Choose the best answer.

I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

Choose the best answer.

We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

Choose the best answer.

I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.