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anonymous

  • 5 years ago

Solve using elimination method: 0.3x - 0.2y = 4 0.4x + 0.5y = 1

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  1. anonymous
    • 5 years ago
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    My answer has to be in an ordered pair and can be used by integers or fractions. It also can have infinitely many solutions or none.

  2. amistre64
    • 5 years ago
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    elimination is such a cruel method...

  3. anonymous
    • 5 years ago
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    I do not understand elimination method at all. I can do substitution but not this stuff.

  4. anonymous
    • 5 years ago
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    i got (7.14,9.286) it's been awhile since ive done this

  5. amistre64
    • 5 years ago
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    you simply eliminate a variable by multiplying or modifying one equation to be the opposite of the other... 0.3x - 0.2y = 4 0.4x + 0.5y = 1

  6. anonymous
    • 5 years ago
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    Mjrizon, that is not correct.

  7. amistre64
    • 5 years ago
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    3/10x - 2/10y = 4 4/10x + 5/10y = 1 (-3/4) 3/10x - 2/10y = 4 -3/10x -15/40y = -3/4

  8. amistre64
    • 5 years ago
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    3/10x - 8/40y = 16/4 -3/10x -15/40y = -3/4 ---------------------- -23/40y = 13/4

  9. anonymous
    • 5 years ago
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    oh ok sorry. forgot to multiply the right side of the equations by the multipliers.

  10. anonymous
    • 5 years ago
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    please dont do all her homework.

  11. anonymous
    • 5 years ago
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    hi amistre, i figured out the surface area problem

  12. amistre64
    • 5 years ago
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    -23/40y = 13/4 y = 13/4 -40/23 y = 13/1 -10/23 = -130/23

  13. anonymous
    • 5 years ago
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    I am stuck on three. Cant people help me with them.

  14. amistre64
    • 5 years ago
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    thats great :)

  15. anonymous
    • 5 years ago
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    blondie, you are being graded or not , be honest

  16. anonymous
    • 5 years ago
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    oh ok sorry. forgot to multiply the right side of the equations by the multipliers.

  17. anonymous
    • 5 years ago
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    yes i will be graded this is a checkpoint. i have the test for this next week though so it will be all new problems.

  18. anonymous
    • 5 years ago
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    so youre cheating pretty much

  19. amistre64
    • 5 years ago
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    is my "y" value good?

  20. anonymous
    • 5 years ago
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    amistre, give her hints :) not answers

  21. anonymous
    • 5 years ago
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    No im asking for help on these last three problems.

  22. anonymous
    • 5 years ago
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    no you didnt ask for help. i read your log

  23. anonymous
    • 5 years ago
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    you wanted the answer

  24. anonymous
    • 5 years ago
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    youre not doing any work

  25. anonymous
    • 5 years ago
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    Okay no i didnt just do any homework whatever. Ill go elsewhere to get help from people then because I dont cheat on my homework

  26. amistre64
    • 5 years ago
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    4x 5 (-130) -- + -------- =1 10 10(23)

  27. anonymous
    • 5 years ago
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    i dont mean to be rude but i dont see any work coming from you

  28. anonymous
    • 5 years ago
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    If i am not doing any of my work then how is my grade an 87.5 for this checkpoint right now?

  29. anonymous
    • 5 years ago
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    amistre, dont kill yourself

  30. anonymous
    • 5 years ago
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    blondie ok . how did you get those answers

  31. anonymous
    • 5 years ago
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    How did i get the other answers for my checkpoint? I was able to figure them out because it wasnt elimination method. It was substitution and graphing.

  32. anonymous
    • 5 years ago
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    youre not asking questions, youre just being spoon fed answers . you would know about that

  33. amistre64
    • 5 years ago
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    4x -65 -- + -------- =1 10 (23) 4x 23 + 65 -- = --------- 10 23 22 10 220 x = ------ = ---- if i didnt mess up along the way 23 23

  34. anonymous
    • 5 years ago
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    this is not the place to post a thousand annoying homework problems,

  35. anonymous
    • 5 years ago
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    post interesting problems

  36. anonymous
    • 5 years ago
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    Yep sure would since my grades are at ah lets see an 89% overall. and I ASKED 3 NOT A THOUSAND

  37. anonymous
    • 5 years ago
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    I think someone should mind their own business.

  38. anonymous
    • 5 years ago
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    3 too many. 1 is a lot

  39. anonymous
    • 5 years ago
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    well im looking out for my buddies

  40. anonymous
    • 5 years ago
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    50 percent of the questions dont get answered, what makes you think youre entitled to it

  41. anonymous
    • 5 years ago
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    90 percent of MY QUESTIONS HAVE NOT BEEN ANSWERED

  42. anonymous
    • 5 years ago
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    anyways, amistre , just word to the wise

  43. amistre64
    • 5 years ago
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    (3/10)(220/23) - (2/10)(-130/23) = 4 (3/1)(22/23) - (2/1)(-13/23) = 4 (66/23) + (26/23) = 4 92/23 = 4 ....4(23) = 92 that ones good

  44. amistre64
    • 5 years ago
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    word to the wise? looks left...looks right.... :)

  45. anonymous
    • 5 years ago
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    should i check your guys work? hmmm, i wonder if you can do this with determinants quickly

  46. amistre64
    • 5 years ago
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    ess one question...and i most likely got it wrong, but might have gotten it right ;)

  47. anonymous
    • 5 years ago
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    I agree with cantorset.

  48. anonymous
    • 5 years ago
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    Although unfortunately people do NOT use this website to post interesting problems, although I guess it is not technically meant for that. If only it were :( So much better.

  49. anonymous
    • 5 years ago
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    i mean youre free to do anything you want. i was just saying, dont exhaust yourself doing solutions without feedback

  50. anonymous
    • 5 years ago
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    newton, yeah, ideally

  51. amistre64
    • 5 years ago
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    oh i agree cantor.... i agree :)

  52. anonymous
    • 5 years ago
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    oh believe me i wont come back to this website. I will find help elsewhere as i said. You can be a wingspan to someone else!!!

  53. amistre64
    • 5 years ago
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    i was wondering if I could do the surface area of that torus with polar stuff....

  54. anonymous
    • 5 years ago
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    i guess interesting is relative/subjective though

  55. anonymous
    • 5 years ago
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    blondie, thats fine

  56. anonymous
    • 5 years ago
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    You were a little harsh to her, specifically, though xD Though I do see that kind of thing on here a lot.

  57. anonymous
    • 5 years ago
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    amistre, yes you can. i want to make a pdf of all the different ways to find surface area

  58. amistre64
    • 5 years ago
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    what i came up with looked like a nightmare to integrate...but it was fun trying lol

  59. anonymous
    • 5 years ago
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    i apologize im harsh today , but i do help

  60. anonymous
    • 5 years ago
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    amistre oh its a fun problem, i will come back to it im going to help avnis , one sec

  61. amistre64
    • 5 years ago
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    wish i could stay and play, but its 3am here and i gotta be able to get up and get my kids in a few hours;) nite nite yall ..

  62. anonymous
    • 5 years ago
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    ok will post tomorrow im happy i figured it out on my own. nobody helped me here :(

  63. amistre64
    • 5 years ago
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    your smart enough to do it on your own ;)

  64. anonymous
    • 5 years ago
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    i peaked your interest , thats good

  65. anonymous
    • 5 years ago
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    well i was stumped. but then i figured out it has to be integral 2pi x dS, to revolve about y axis integral 2pi y dS revolves about x axis ( and that makes a sphere)

  66. anonymous
    • 5 years ago
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    thats why we got 4pi*r^2 something

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