Предмет: Алгебра, автор: 4ent0

Решите неравенство:
5х^2 + 4х -1/ 7-2х < 0

Ответы

Автор ответа: missFr
3
Решение будет вам полезным.Спрашивайте,что неясно.
Приложения:
4ent0: Откуда 3.5
missFr: Это нуль выражения знаменателя.Я не расписывала,поэтому прошу спрашивать.
Т.е. нули выражений дроби разбивают область значений дроби на промежутки знакопостоянства.
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3. In which sentence is the Present Perfect used correctly?
A) I has bought a new computer.
D) I have bought a new computer.
B) I have buyed a new computer.
E) I have to buy a new computer.
C) I bought a new computer.
4. The underlined word is: “The letter written by her was full of mistakes".
A) Gerund
C) Participle I
E) Passive Infinitive
B) Participle II
D) Infinitive
5. Choose the right variant: A cold wind__for the last three days
A) has been blowing
C) is blowing
E) have been blowing
B) blows
D) blew
6. By the year 2020 the population of the world. to 8 billion.
A) will increase
C) will have increased
E) would increase
B) increases
D) is increasing
7. If the weather sunny, we'd go to the beach.
A) had been
D) would be
B) is
E) was
C) were
8. By the time I arrived at the station, the train
A) had left
C) left
E) would leave
B) has left
D) will leave
9. Which is the correct reported speech of - He asked, “Do you have a car?"
A) He asked do I have car?
D) He asked if you had a car.
E) He asked if I have a car.
B) He asked do you have a car?
C) He asked if I had a car.
10. How long you lived here?
C) been
A) have
E) do
B) has
D) is
11. Sentence with Possessive.
A) My sisters live in Astana.
D) My sister's room is large.
E) My sister's a manager.
B) My sisters are older than my brother.
C) My sister's a big house.
12. I hate driving my ........... car.
E) fathers' of
A) father's
C) fathers'
B) fathers
D) fathers's
13. Find the antonym of the word: First.
E) next
A) second.
C) begin.
B) finish.
D) last.
14. Comparative adjective: Your work is....in class.
E) worse
A) worser
C) worst
B) the worst
D) bad
15. Mary's _ _ the garden.
E) with
A) in
C) on
D) into
16. It's your mother's father. It is a
A) mother
B) father
D) grandfather
17. Find the synonym of the word: beautiful
B) at
E) sister-in-law
C) grandmother​
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