Предмет: Алгебра, автор: vlwda98

упростить выражение (7+y)(7-y)+4y+y (в квадрате)и найии значение при y=0.3

Ответы

Автор ответа: Senya1608

0

49-7y+7y-y(к квадрате) +4у+у(в квадрате)=49+4у

Если у=0.3, то 49 +4*0.3=49.2

Автор ответа: nasssyny

0

(7+y)(7-y)+4y+y (в квадрате)
14-1y(в квадрате)+4у+у(в квадрате)=14+4у
(7+0,3)(7-0,3)+4*0,3+0,3(в квадрате)=50,2
если умножать при 14+4у=14+4*0,3=15,2

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Қазақ тiлi, автор: ospan2007sanzhar

На отрезке АВ отмечены точки С и Д.
а) Найдите длину отрезка СД, если АВ= 8,4 см, АС= 2,1 см, ВД= 1,3 см.

6 лет назад

Предмет: Математика, автор: finizhisei

Во сколько раз увеличится периметр квадрата, естн его площадь
увеличилась в 16 раз?

6 лет назад

Предмет: Английский язык, автор: xxmev

тест по английскому, помогите, пожалуйста

1. Choose the right variant: He thought that he ___ in a bank.
A) Worked
B) Work
C) Is working
D) Works
E) Am working

2. Complete the sentence: Please, clean … blackboard:

A) The

B) An

C) A

D) Those
E) Some

3. Fill in the blank: She reads …. books.
A) Many
B) Little
C) Much
D) Every
E) One

4. Choose the right variant…… do you live?

A) Where

B) Whom

C) Which

D) What

E) Who

5. Complete the sentence:Please, bring me … apples.

A) Some

B) Anybody

C) Nothing

D) Someone

E) One

6. Complete the sentence: We arrived … England last week.

A) in

B) on

C) to

D) for

E) at

7. Choose the right variant : We … to Ireland for our holidays last year.

A) Went

B) Going

C) Goes

D) Have gone

E) Go

8. Complete the sentence. The building … last year:

A) Was built

B) Built

C) Build

D) Are building

E) Were built

9. Complete the sentence: I … be in time for work:

A) Must

B) Can

C) Am able to

D) May

E) Could

10. Choose the right variant: Is that my key, or is it ?
A) Yours

B) The yours

C) The your’s
D) Are you

E) Your

11. Choose the right variant: What are you going to do ____ afternoon?
A) This
B) His
C) It
D) Same

E) Its

12. Complete the sentence: We haven’t got … bread
A) Any

B) Some

C) The more

D) No

E) Something

13. Choose the right variant: Lion is the …. Animal
A) Strongest
B) Most strong
C) As no strong as
D) Stronger
E) As strong as

14. Choose the right variant: We were ____ late
A) Terribly
B) Terrible
C) More terrible
D) Much terrible
E) Terribler

15. Choose the right variant: When I looked round the door, the baby … quietly
A) Was sleeping
B) Were sleeping
C) Are sleeping
D) Slept

E) Is sleeping

16. Complete the sentence: The Tower of London … with the royal dynasties:

A) Is connected

B) Connected

C) Is connecting

D) Will connect

E) Connects

17. Choose the right variant: When I ____ home I met my brother.
A) Was going
B) Gone
C) Go
D) Goes
E) Was gone

18. Complete the sentence: How long …. at the airport?
A) Have you worked
B) Does you work
C) Would you work
D) You have worked
E) Does you worked

19. Choose the right variant: He picked up the letter ____ on the floor.
A) Lying
B) Lain
C) Having lain
D) Lay
E) Laid

20. Choose correct noun in plural form:
A) Dresses
B) Dresess
C) Dressen
D) Dressis
E) Dress

21. Complete the sentence: They … their English in the morning:
A) Have
B) Has
C) Is having
D) have had
E) Was having

22. Choose the right variant: Peter and ____ are students.
A) I
B) Them
C) Him
D) Her
E) Us

23. Choose the right variant: I couldn’t see ___ eyes because she was wearing dark glasses.
A) Her
B) My
C) Their
D) Mine
E) His

24. Complete the sentence:… father is an architect.
A) His
B) They
C) She
D) Us
E) Hers

25. Complete the sentence: It costs four … dollars.
A) Hundred
B) A hundred
C) Hundreds
D) Hundredses
E) The hundred

6 лет назад

Предмет: Математика, автор: Аноним

от станции в направлении поселка ,расстояние до которого 24км,вышел пешеход со скоростью 4км/час.через 2 часа навстречу ему из поселка выехал велосипедист со скоростью 12км/час.через сколько часов после своего выхода пешеход встретит велосипедиста?

10 лет назад

Предмет: География, автор: Gorrik

Определите время в Нью-йорке ,если в Минске 9:00(т.е надо сложить время и кол-во поясов и т.д.) Если сможите то полное решение этой задачи

10 лет назад