Изобразите схематически график функции 1)y=4x^2 2)y=1/4x^2-3

ответ на задание смотри в приложении.

Unit 4 Eating Out

Match the words in A with its explanation in B

1.a quality a) no good

2. abundant b) large quantities

3. customary c) to add to a dish to make it look

attractive

4. distinctive d) how good or bad something is

5. to garnish e) quickly

6.interior f) usual

7. inferior g) inside of building

8. relatively h) usual

9. rapidly i)comparatively

II. Complete the sentences with the above words:

1. design is the art of planning the decoration of the inside a house or an

office

4. These shoes are f good .

5. She made progess and was soon the best in the class.

6. thedi with parsley and serve!

7. We look a supply of food with us when we went hiking in the

mountains

8. He’s a good tennis player.

9. This sauce has a very taste.

Объяснение: Unit 4 Eating Out

Match the words in A with its explanation in B

1.a quality a) no good

2. abundant b) large quantities

3. customary c) to add to a dish to make it look

attractive

4. distinctive d) how good or bad something is

5. to garnish e) quickly

6.interior f) usual

7. inferior g) inside of building

8. relatively h) usual

9. rapidly i)comparatively

II. Complete the sentences with the above words:

1. design is the art of planning the decoration of the inside a house or an

office.

2. It’s to hold the door open for someone who is entering a building

behind you.

3. They were very upset. They had bought goods of quality.

4. These shoes are of good .

5. She made progress and was soon the best in the class.

6. the dish with parsley and serve!

7. We look an supply of food with us when we went hiking in the

mountains.

8. He’s a good tennis player.

9. This sauce has a very taste.

(-2; -1). да.

Объяснение:

1.

1.1. в первом уравнении выводим значение у:

у = 0,5х

1.2. во второе уравнение вносим полученное значение у, образовав тем самым подобные пары с х:

2х + 0,5х = -5

теперь уже легко можно вычислить числовое значение х. сводим подобные числа и находим х:

2,5х = -5,

х = -2.

1.3. найдя числовое значение х, мы сможем теперь найти и числовое значение у. это проще сделать с второго уравнения:

2 (-2) + у = -5,

-4 + у = -5,

у = -1.

точка пересечения двух прямых (-2; -1).

2.

подставим значения координат х и у точки в третье уравнение прямой:

3 (-2) - 2 (-1) = -4

-6 + 2 = -4

-4 = -4.

значит, третья прямая проходит через эту точку.