Предмет: Математика, автор: JABAHED

Помогите прошу срочно

Приложения:

Ответы

Автор ответа: lookhereistruth
1

Ответ:

10)e

11)3

12)e

13)-2

14)2

15)3

16)c

Пошаговое объяснение:

11)6/2=3

13)-8/4=-2

14)

4*-0.25=-12x-ay+5=0

Ay=2x+5

Y=(2x+5)/a

Y=(2x+5)/a+5/a

Y=(2/a)x+5/a

A²x+4y-3=0

-4y=a²x-3

Y=(a²x-3)/-4

Y=((a²x)/-4)-(3/-4)

Y=(a²/-4)x-(3/-4)

Для перпендикулярности нужно чтобы:

(2/a)*(a²/-4)=-1

2a²/-4a=-1

2a²=4a

A²=2a

A*A=2*a

A=2

15)

9x+a²y+3=0

A²y=9x+3

Y=(9x+3)/a²

Y=9x/a²+3/a²

Y=(9/a²)x+3/a²

Ax+3y-1=0

-3y=ax-1

Y=(ax-1)/-3

Y=(ax/-3)-(1/-3)

Y=(a/-3)x-(1/-3)

Для перпендикулярности нужно чтобы:

(9/a²)*(a/-3)=-1

9a/-3a²=-1

9a=3a²

3a=a²

3a=a*a

A=3

16) коэффициент икса в варианте c - четыре, -0.25*4=-1


JABAHED: Спасибо
Интересные вопросы
Предмет: Русский язык, автор: юдюотт
Предмет: Математика, автор: DanaAsanova
Предмет: Английский язык, автор: lifeminelivegood
Vocabulary and Grammar A. Choose the correct item. 1. Helen has got a __________ sister. A. double B. twice C. twin 2. I have basketball _____ Mondays. A. on B. at C. in 3. I have got a big ______ in my bedroom. A. sink B. cupboard C. wardrobe 4. Bob usually has ________ bacon for breakfast. A. any B. some C. the 5. August is the ______ month of the year. A. eight B. eighth C. eighteen 6. I go to school ______ bus. A. by B. on C. in 7. Bob and Mary can _______ a bike. A. ride B. drive C. sail 8. It is going to be a _____ day, so take your umbrella. A. wet B. sunny C. hot 9. Watch ____! There is a car coming. A. up B. over C. out 10. It is time to _____ to bed. A. go B. have C. take 11. He _______ literature at school. A. teachers B. teach C. teaching 12. She is really keen ____ cycling. A. on B. of C. in 13. My mum _______ very well. A. is cooking B. cooks C. has cooked 14. At Halloween we all wear _______ . A. cake B. costumes C. fireworks 15. Mary is doing the __________. She loves plants and flowers. A. dusting B. homework C. gardening 16. I want ______ ice cream. A. some B. any C. about 17. Susan lives in a block of ________. A. flats B. rooms C. palace 18. We usually ______ shopping at the weekends. A. do B. go C. play 19. John is doing a _______ puzzle. A. jigsaw B.scrabble C. Monopole 20. We were afraid to swim in the______ river. A. polluted B. deserted C. clean 21. Did you ____ your granny yesterday? A. visit B. visited C. visits 22. I _____ at the door but no one answered. A. knocked B. hit C. rang 23. I saw him two dais ______. A. ago B. past C. gone 24. Be quite. You ____ make noise. A. can B. must not C. must 25. She is not _____ to go to the library. A. will B. would C. going 26. Lets go and see the animals in the _______ A. stadium B. zoo C. library 27. People in the country side are _____ than in the city. A. friendly B. friendlier C. friendliest. 28. There are a lots of works of art in the ________. A. gallery B. palace C. house 29. He is going to the International Summer ______ in august. A. school B. flat C. house 30. You are on holiday. You _____ wake up early . A. have to B. must not C. need not. Every day English. B. Choose the correct response. 31. How about going to the aquarium? a) I do not really like fish. b) Yes, I need some exercise 32. Excuse me. Is this Mr. Browns office? a) thank you. b) Yes. What I can do for you? 33. What do you do on your free time? a) I love going wind surfing. b) I have the perfect thing for you. 34. Could I have your name please? a) Yes. It is Brown. Mr. Brown b) You are welcome Mr. Brown. 35. Would you like anything to eat? a) fruit salad, Please. b) a cup of tea, please.