Тест на тему Источники опасности в быту

1. Упростите выражение: 3x + 5 - 2x A) x + 5 B) x - 5 C) 5x + 3 D) 5 Ответ: A

2. Решите уравнение: 2x - 7 = 3 A) x = 2 B) x = 5 C) x = 3 D) x = 7 Ответ: B

3. Упростите выражение: 4(2y - 3) + 6 A) 8y - 6 B) 8y + 6 C) 8y - 12 D) 2y - 3 Ответ: A

4. Решите уравнение: (x + 4)/3 = 7 A) x = 14 B) x = 17 C) x = 21 D) x = 19 Ответ: B

5. Упростите выражение: 5a - 2(a - 3) A) 3a + 6 B) 7a - 6 C) 3a - 6 D) 2a + 6 Ответ: A

6. В системе уравнений x + y = 4 и x - y = 2 найдите x и y A) x = 2, y = 2 B) x = 3, y = 1 C) x = 1, y = 3 D) x = 0, y = 4 Ответ: B

7. Упростите выражение: (2t + 3) - (t - 4) A) t + 7 B) t - 1 C) 3t + 7 D) t + 1 Ответ: A

8. Решите уравнение: (1/3)x - 5 = 7 A) x = 12 B) x = 18 C) x = 36 D) x = 24 Ответ: C

9. Упростите выражение: 6x - 9x + 4x A) x B) -x C) 19x D) 1/x Ответ: A

10. Разложите на множители: 6x + 9 A) 3(2x + 3) B) 6x + 9 C) 9(2x - 1) D) 3(4x + 3) Ответ: A

Инструкция: Выберите один правильный вариант ответа в каждом вопросе.

1. I ... to the museum yesterday. A) go B) went C) going D) has gone

2. She ... TV at 8 p.m. last night. A) watches B) watched C) was watching D) has watched

3. By the time I arrived, they ... already. A) leave B) had left C) left D) have left

4. She ... for two hours when the bus finally arrived. A) had waited B) had been waiting C) waited D) is waiting

5. When I called him, he ... dinner. A) has B) had C) have D) was having

6. While I ..., the lights went out. A) read B) was reading C) am reading D) have read

7. By the end of the day, they ... the project. A) finished B) had finished C) have finished D) are finishing

8. He ... his homework before dinner. A) did B) has done C) had done D) will do

9. The phone ... while I was cooking. A) rang B) rings C) has rung D) was rung

10. He ... the film yesterday. A) watched B) doesn't watch C) didn't watch D) not watched

11. How long ... when you finally saw him? A) did you wait B) had you waited C) had you been waiting D) you were waiting

12. When ... you finish the report? A) do B) did C) have D) will

13. I ... a new jacket last weekend. A) buy B) bought C) buyed D) buying

14. We didn't go to the concert because it ... . A) rain B) rained C) was raining D) had rained

15. By the time the train arrived, they ... on the platform for over an hour. A) are waiting B) had been waiting C) waited D) were waiting

Тест по математике: операции над множествами

Класс: 11

Инструкция: соедините элементы из первой колонки с соответствующими элементами из второй колонки.

1. Множество A = {1, 2, 3}, Множество B = {2, 3, 4}

   a. A ∩ B

2. Множество C = {4, 5, 6}, Множество D = {5, 6, 7}

   b. C ∪ D

3. Множество X = {a, b, c}, Множество Y = {b, c, d}

   c. Y ∩ X

4. Множество M = {10, 20, 30}, Множество N = {20, 30, 40}

   d. M ∩ N

5. Множество P = {red, green, blue}, Множество Q = {green, blue, yellow}

   e. P ∪ Q

6. Множество R = {circle, square, triangle}, Множество S = {square, triangle, pentagon}

   f. R ∩ S

7. Множество U = {apple, banana, cherry}, Множество V = {banana, cherry, date}

   g. U ∪ V

8. Множество G = {January, February, March}, Множество H = {February, March, April}

   h. G ∩ H

9. Множество T = {cat, dog, rabbit}, Множество W = {dog, rabbit, squirrel}

   i. T ∪ W

10. Множество Z = {car, bus, bike}, Множество Y = {bus, bike, train}

    j. Z ∩ Y

Ответы:

1 - a, 2 - b, 3 - c, 4 - d, 5 - e, 6 - f, 7 - g, 8 - h, 9 - i, 10 - j

Желаю удачи на тесте!