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anonymous

  • one year ago

qUESTION?

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  1. anonymous
    • one year ago
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  2. Michele_Laino
    • one year ago
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    your sequence, is an arithmetic sequence, whose constant is: -42-(-38)=-38-(-34)=-4

  3. Michele_Laino
    • one year ago
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    so we can write the general formula of the n-th term as below: \[{a_n} = {a_1} + \left( {n - 1} \right)d\] where a1 is the first term and d=-4

  4. anonymous
    • one year ago
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    its c

  5. anonymous
    • one year ago
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    right?

  6. Michele_Laino
    • one year ago
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    now, if we set n=10, we can write this: \[\begin{gathered} - 34 = {a_1} + 9 \times \left( { - 4} \right) \hfill \\ \hfill \\ - 34 = {a_1} - 36 \hfill \\ \end{gathered} \] what is a1?

  7. anonymous
    • one year ago
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    2?

  8. Michele_Laino
    • one year ago
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    that's right!

  9. Michele_Laino
    • one year ago
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    by definition, the second term is: \[\begin{gathered} {a_2} = {a_1} + d \hfill \\ {a_2} = 2 + \left( { - 4} \right) \hfill \\ \end{gathered} \] what is a2?

  10. anonymous
    • one year ago
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    -2?

  11. Michele_Laino
    • one year ago
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    that's right! so, what is the right option?

  12. anonymous
    • one year ago
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    B!

  13. Michele_Laino
    • one year ago
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    correct!

  14. anonymous
    • one year ago
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    thankkk youuu!!

  15. Michele_Laino
    • one year ago
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    :)

  16. anonymous
    • one year ago
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    could you help me with 2 more please? @Michele_Laino

  17. Michele_Laino
    • one year ago
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    yes!

  18. anonymous
    • one year ago
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  19. anonymous
    • one year ago
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  20. Michele_Laino
    • one year ago
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    first question: the equation of your line is: \[\Large \frac{x}{{ - 4}} + \frac{y}{1} = 1\]

  21. anonymous
    • one year ago
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    I'm thinking B

  22. Michele_Laino
    • one year ago
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    we have to rewrite that equation in this form: ax+by=c what do you get?

  23. anonymous
    • one year ago
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    -4x + 1y =1?

  24. Michele_Laino
    • one year ago
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    I got this: \[ - x + 4y = 4\]

  25. anonymous
    • one year ago
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    ill go with what you have since your more experienced

  26. Michele_Laino
    • one year ago
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    it is a simple computation, if I multiply both sides by 4, I get this: \[\Large 4 \times \left( {\frac{x}{{ - 4}} + \frac{y}{1}} \right) = 4 \times 1\] please simplify

  27. anonymous
    • one year ago
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    do i graph what you got?

  28. Michele_Laino
    • one year ago
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    our points, namely the shaded region, is represented by the subsequent inequality: ax+by>c

  29. Michele_Laino
    • one year ago
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    so, what is that inequality in our case?

  30. anonymous
    • one year ago
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    b??

  31. Michele_Laino
    • one year ago
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    yes!

  32. anonymous
    • one year ago
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    OMGGG THANK YOUUU!! can you help me with the second one too pls?!

  33. Michele_Laino
    • one year ago
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    ok!

  34. anonymous
    • one year ago
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    wait

  35. anonymous
    • one year ago
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    wrong attachment!

  36. anonymous
    • one year ago
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  37. Michele_Laino
    • one year ago
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    second question: If i sum, side by side, the first and the second equation together, I get this: \[\Large \left( {x + 3y} \right) + \left( {7x - 8y} \right) = 5 + 6\] please simplify, what do you get?

  38. anonymous
    • one year ago
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    8x -5y= 11

  39. Michele_Laino
    • one year ago
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    that's right! so what is the right option?

  40. anonymous
    • one year ago
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    B

  41. anonymous
    • one year ago
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    right?

  42. Michele_Laino
    • one year ago
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    right!

  43. anonymous
    • one year ago
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    THANK. YOU. SO. MUCHHH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  44. Michele_Laino
    • one year ago
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    now we have to find the solutions of this system: \[\left\{ \begin{gathered} 7x - 8y = 6 \hfill \\ 8x - 5y = 11 \hfill \\ \end{gathered} \right.\]

  45. Michele_Laino
    • one year ago
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    right?

  46. anonymous
    • one year ago
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    what do you mean?

  47. Michele_Laino
    • one year ago
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    sorry, I believed that we have to find the solutions also

  48. Michele_Laino
    • one year ago
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    we have completed our exercise

  49. anonymous
    • one year ago
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    its ok lol. thanks though. i really appreciate it

  50. Michele_Laino
    • one year ago
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    :)

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