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tej18 Group Title

[6.03] What is the value of the y variable in the solution to the following system of equations? 2x + y = 5 x + 3y = 0 −1 1 3 −3

  • one year ago
  • one year ago

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  1. tej18 Group Title
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    i really need help :0

    • one year ago
  2. abayomi12 Group Title
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    Let x = xylophones and y = yachts. Fred is buying xylophones and yachts. He does not pay attention to how much each costs, rather he just pays for all of them in one go. When he visits the shop on Monday, he buys two xylophones and one yacht for a total price of $9. He then thanks the salesman and goes home. The next day he buys three xylophones and four yachts for a total price of $26. Fred is now deeply curious as to how much his xylophones and yachts would have cost him individually, so he sets up a set of simultaneous equations in an attempt to find an answer to the ultimate question... 2x + y = 9 3x + 4y = 26 Transpose equation 1 and substitute into 2: y = 9 - 2x 3x + 4(9 - 2x) = 26 3x + 36 - 8x = 26 -5x = -10 x = 2 y = 9 - 4 y = 5 So it turns out that xylophones cost $2 each and yachts cost $5 each. ANSWERS: 3. Parallel 4. -6 + x 8. -1 9. (9, -1) 10. Multiply the first equation by -2 11. 42 12. 22.95 + 0.08m = 27.95 + 0.06m 13. 70 14. d = 3(r – 30) and d = 2(r + 30) 15. 3 hours 16. (5, 1) 17. Green area: 2x + y > 2 and x − y < 6 Yellow area: 2x + y > 2 and x − y > 6 18. Answer shown in part 2 (very long answer)

    • one year ago
  3. mathslover Group Title
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    \[\large{\color{red}{2x+y=5}}\] \[\large{\color{blue}{\textbf{Solve for x in this eqn}}}\]

    • one year ago
  4. mathslover Group Title
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    @tej18 what do you get after solving for x in 2x+y=5

    • one year ago
  5. sauravshakya Group Title
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    OMG......... what is that @abayomi12

    • one year ago
  6. tej18 Group Title
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    ikr! @sauravshakya

    • one year ago
  7. tej18 Group Title
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    i dont get it @mathslover

    • one year ago
  8. mathslover Group Title
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    2x+y=5 2x=5-y solve for x

    • one year ago
  9. tej18 Group Title
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    ohh

    • one year ago
  10. abayomi12 Group Title
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    teji u still don't get the answer that all the answer i just solved there

    • one year ago
  11. tej18 Group Title
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    @mathslover so x= 5/2 - y/2??

    • one year ago
  12. mathslover Group Title
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    x=(5-y)/2 put this in 2nd eqn

    • one year ago
  13. mathslover Group Title
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    solve for y then you will get your answer

    • one year ago
  14. tej18 Group Title
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    i m confused @mathslover

    • one year ago
  15. mathslover Group Title
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    \[\large{x=\frac{5-y}{2}}\] \[\large{x+3y=0}\] \[\large{\frac{5-y}{2}+3y=0}\] \[\large{\frac{5-y+2y}{2}=0}\] \[\large{5+y=0}\]

    • one year ago
  16. mathslover Group Title
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    oops sorry : \[\large{\frac{5-y+6y}{2}=0}\] \[\large{5+5y=0}\]

    • one year ago
  17. tej18 Group Title
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    so y=0? @mathslover

    • one year ago
  18. tej18 Group Title
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    @mathslover

    • one year ago
  19. Kaederfds Group Title
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    i got y = (-1)

    • one year ago
  20. tej18 Group Title
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    oh kk thanks! @Kaederfds

    • one year ago
  21. Sulli_lim Group Title
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    Answer: -1 2x+y=5 x+3y=0 So, x=-3y Substitute x=-3y into 2x+y=5 2(-3y)+y=5 -6y+y=5 -5y=5 y=-1

    • one year ago
  22. mathslover Group Title
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    5y=-5 y=-1 @tej18

    • one year ago
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