Дана функция у=1/7х(в квадрате).При каких значениях х функции равны -7; 7; 0; 1?

Составьте выражение по условию и упростите его:

А)Какое расстояние проехал автомобиль,если он ехал 4 ч. со сокростью y км/ч ,а в следующие 2 ч. его скорость была на 10 км/ч больше?

Б) Какое расстояние преодолел турист,если 3 ч.он ехал на велосипеде со скоростью a км/ч ,затем 1.5 ч.шёл пешком со скоростью,на b км/ч меньшей?

Вычислите объём воздуха (н. у.) , который потребуется для сжигании 250 м3 метана.объёмная доля кислорода в воздухе 21%

Оле и ее папе вместе 3 года назад было30 лет.сколькл лет им будет вместе через 3 года.

5.4.Put the following sentences into negative and interrogative forms:

1. Someone is waiting for you in that room.

2. He knows nothing about the arson.-задать 2 вопроса.

3. We know something that can be useful for the investigation of the treason.

4. Everybody approved his conviction.

5. You can find evidence everywhere at the crime scence.

5.3.Read the words, determine what parts of speech they belong to and by means of what suffixes they are formed and translate them into Russian:

darkness, readiness, demonstration, sailor, especially, brightly, weakness, celebration, happiness, examiner, introduction, understandable, agreement, delegation, fatherless, hopeful, nameless, indifferent.

5.6.Read and translate the following sentences using the correct form of the verbs in brackets:

1. We (to find)....... very important evidence during the crime scene search.

2. Is everybody here? - No, one of our divisional inspectors (not to come).......................yet.

3. You anything (to hear).............about the government building arson?

4. He never (to prejudice)................his actions.

5. Why are you here? You are to interview witnesses.- But we already (to do)............................it.

6. Will you call after 3 o'clock? He (to arrive)...........by that time.

7. He already (to interrogate).......................the suspect when I saw him.