-х в квадрате - 26 х + 169 > 0
помогите :))

Определите координаты высочайших точек всех материков Земли??

вставьте mustn't или needn't

1. you...wash up. i can do it.

2. you...join this queue to the cafe. i've got sandwiches and coke.

3.you...open this door. it's broken.

4.you...go out. it's very cold.

5.you...translate this text.

6.you...go shopping. we've got  a lot of food.

7.you...read this book. it's not for children.