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## Tahmina 2 years ago systems help!

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1. kropot72

The two lines intersect at the point (-2, 1).

2. Tahmina

thanks for coming !

3. timo86m

y=mx+b use that formula use it twice and make the y and x equal but vary the m and b -2=m_1*1+b_1 -2=m_2*1+b_2 that ought to work i think.

4. Tahmina

i dont understand!

5. timo86m

make the y and x equal to (-2,1).

6. ghazi

from a point there could be infinitely many lines can pass through

7. ghazi

so it could be so just write y=mx+c and put y=1 and x=-2

8. Tahmina

so :1=m(-2)+b

9. Tahmina

?

10. ghazi

it could be anything like y=x+3

11. Tahmina

oh okay

12. Tahmina

i need another equation!

13. tafkas77

You need another equation?

14. tafkas77

Or another explanation?

15. Tahmina

i need to label line and bi have line a which is y=x+3 now i need another equation!

16. Tahmina

need to label line a and b and i have line a already

17. Tahmina

let me scan the paper for you so it will help u okay

18. tafkas77

Wow, I was just about to ask you! :) Okay! :)

19. Tahmina

sorry cofee fell on it butll make sure ill show u just give me 2 minutes okay! :)

20. tafkas77

Sure! Take your time. :)

21. Tahmina

i think this is it!

22. Tahmina

the second questions says what is the quation of each line u drew in problem 5? explain how u wrote each equation!

23. tafkas77

Hmm, just a sec, Tahmina. I must go calm my dog down (she's scared of thunder lol). But I have reviewed your question. :)

24. Tahmina

okay but i need u so please hurry! i have to got to bed its kinda getting late and i have school and i need to get enough sleep! thanks!

25. Tahmina

:)

26. Tahmina

what happened? :(

27. Tahmina

u suddenly were typing then poof ur gone oh tafkas i really need ur help please!

28. Tahmina

yeah theres u go ur typing again :) yay! :)

29. tafkas77

Poor dog! :) Arrgh... Pick any two points that you made, then use this calculator: http://www.miniwebtool.com/slope-intercept-form-calculator/ It will also show you the steps.

30. tafkas77

sorry about that. :/

31. Tahmina

im bad at this i tried this kind athying! sorry about that!

32. tafkas77

The points on your line that I would use are (-2, 1) and (0,3)

33. tafkas77

ONce you plug in those values, it will create the equation that you need.

34. Tahmina

but i dont have another coordinates can u show me im confused and tired :(

35. tafkas77

here, I plugged it in for you: http://www.miniwebtool.com/slope-intercept-form-calculator/?x1=-2&y1=1&x2=0&y2=3

36. Tahmina

thansk! i need line b now

37. Tahmina

please!

38. tafkas77

Okay, line b must be parallel. do point slope form: y - y1 = m(x - x1) and plug in your values: y - (1) = 1(x - (-2)) y - 1 = x + 2 y = x +3 since your slope is one, you can have literally anything for your next line: y = x + 5 got it?

39. Tahmina

oh okay! i was gonna ask u that!

40. Tahmina

sam slope but difrent y itercep tno wits coming back to me ohhh

41. tafkas77

Great! So you think you got it, now?

42. Tahmina

yeah! thanks! for all ur help1

43. tafkas77

Awesome! You're welcome, Tahmina. You know I don't mind helping you. :) Oh, there's the dog again... :)

44. Tahmina

and the lightining?

45. tafkas77

Ha ha, it freaks her out. She's not a chihuahua, but she shakes like one when she hears thunder XD

46. Tahmina

can u help me with another problem!?

47. Tahmina

|dw:1362706517622:dw|

48. Tahmina

hello?

49. Tahmina

:)

50. tafkas77

Let's get rid of "y." The second equation can be simplified. Divide all those terms in the second equation by 4: 2x+3y=2 (24x+4y=12)/4 --> new equation: 6x + y = 3 NEW SYSTEM: 2x+3y=2 6x + y = 3 multiply second equation by -3 to get rid of the y terms. NEW SYSTEM: 2x+3y=2 -18x -3y = -9 ____________________________________ (add the equations) -16x = -7 x =....... Do you understand this?

51. Tahmina

so the answer is c?

52. Tahmina

thanks!

53. Tahmina

tgt bye ! have to pray ans take a shower see u next time!

54. tafkas77

Yes! :) See you next time! :D

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