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anonymous

  • one year ago

@Abhisar @nincompoop @Michele_Laino Can I get some help please? Question is attached.

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  1. anonymous
    • one year ago
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  2. misty1212
    • one year ago
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    HI!!

  3. anonymous
    • one year ago
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    hi

  4. misty1212
    • one year ago
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    a) add 9 b) divide by 4 c) take the square root

  5. misty1212
    • one year ago
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    don't forget the \(\pm\)

  6. Michele_Laino
    • one year ago
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    if I add 9 to both sides, I get: \[\Large 4{r^2} - 9 + 9 = 91 + 9\] please simplify

  7. anonymous
    • one year ago
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    4r^2=100

  8. Michele_Laino
    • one year ago
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    ok! now I diveide by 4, both sides, so I get: \[\Large {r^2} = \frac{{100}}{4}\]

  9. Michele_Laino
    • one year ago
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    please simplify

  10. anonymous
    • one year ago
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    25

  11. Michele_Laino
    • one year ago
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    ok! now we have to take the square root of both sides, so we can write: \[\Large r = \pm \sqrt {25} = ...\]

  12. anonymous
    • one year ago
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    so now just the square root of 25?

  13. Michele_Laino
    • one year ago
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    yes! please remember we have two values since we can write this: (-5)^2= 25 (+5)^2=25

  14. Michele_Laino
    • one year ago
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    so we can write: \[\Large r = \pm \sqrt {25} = \pm 5\]

  15. anonymous
    • one year ago
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    so the answer is

  16. anonymous
    • one year ago
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    @Michele_Laino is C correct?

  17. anonymous
    • one year ago
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    @Michele_Laino

  18. Michele_Laino
    • one year ago
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    yes! It is correct!

  19. anonymous
    • one year ago
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    can u hrelp me with more please?

  20. Michele_Laino
    • one year ago
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    ok!

  21. anonymous
    • one year ago
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    *help

  22. anonymous
    • one year ago
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    lol

  23. anonymous
    • one year ago
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  24. Michele_Laino
    • one year ago
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    if we take the square root of both sides, we get: \[\Large z + 7 = \pm \sqrt 3 \]

  25. Michele_Laino
    • one year ago
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    now, I subtract 7 at both sides, so I get: \[\Large z + 7 - 7 = \pm \sqrt 3 - 7\] please simplify

  26. anonymous
    • one year ago
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    z= 4

  27. Michele_Laino
    • one year ago
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    no, since at the right side we have not 7-3, the the simplified expression is: \[\Large z = - 7 \pm \sqrt 3 \]

  28. anonymous
    • one year ago
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    so a?

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

  30. anonymous
    • one year ago
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    more?

  31. anonymous
    • one year ago
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    please?

  32. anonymous
    • one year ago
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  33. Michele_Laino
    • one year ago
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    if we subtract 4 from both sides, I get: \[\Large {x^2} - 12x + 36 - 4 = 4 - 4\] please simplify

  34. anonymous
    • one year ago
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    ???

  35. Michele_Laino
    • one year ago
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    what is 36-4=...?

  36. Michele_Laino
    • one year ago
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    after that simplification, we can write this: \[\Large {x^2} - 12x + 32 = 0\]

  37. anonymous
    • one year ago
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    ok so whats the answer

  38. Michele_Laino
    • one year ago
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    now we have to solve that equation. Do you know how to solve that quadratic equation?

  39. anonymous
    • one year ago
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    nope

  40. anonymous
    • one year ago
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    how? @Michele_Laino

  41. anonymous
    • one year ago
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    @Michele_Laino how do i?

  42. Michele_Laino
    • one year ago
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    then we have to apply another method

  43. anonymous
    • one year ago
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    kk how?

  44. Michele_Laino
    • one year ago
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    we have to search for 2 numbers, such that their sum is 12 and their product is 32

  45. anonymous
    • one year ago
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    8 4

  46. Michele_Laino
    • one year ago
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    that's right! so the requested factorization is: \[\Large {x^2} - 12x + 32 = \left( {x - 8} \right)\left( {x - 4} \right)\]

  47. anonymous
    • one year ago
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    so C?

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

  49. anonymous
    • one year ago
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  50. Michele_Laino
    • one year ago
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    using the rule of the square of a binomial, we can write this: \[\Large {y^2} + 14y + 49 = {\left( {y + 7} \right)^2}\]

  51. Michele_Laino
    • one year ago
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    now: for what values for y, we have \[\Large {\left( {y + 7} \right)^2}=0\]

  52. Michele_Laino
    • one year ago
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    if y= -7, what is (y+7)^2=...

  53. anonymous
    • one year ago
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    0 @Michele_Laino

  54. Michele_Laino
    • one year ago
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    ok! so what is the requested value of y?

  55. anonymous
    • one year ago
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    answer A?

  56. Michele_Laino
    • one year ago
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    that value for y is y=-7, since (-7+7)^2=0 so what is the right option?

  57. anonymous
    • one year ago
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    a or b

  58. Michele_Laino
    • one year ago
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    I think option d

  59. anonymous
    • one year ago
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    u r right

  60. Michele_Laino
    • one year ago
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    thanks! :)

  61. anonymous
    • one year ago
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    hey quick question r u good at english too?

  62. Michele_Laino
    • one year ago
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    I try, please keep in mind that I'm Italian

  63. anonymous
    • one year ago
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    oh ok but you do know i mean grammar right?

  64. Michele_Laino
    • one year ago
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    yes!

  65. anonymous
    • one year ago
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    lol im stuck on complements

  66. Michele_Laino
    • one year ago
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    ok! please post your question

  67. anonymous
    • one year ago
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    Which describes the underlined word in the sentence? The boys were playing a GAME of chess. A. direct object B. indirect object C. predicate adjective D. predicate nominative

  68. Michele_Laino
    • one year ago
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    please wait I'm ponedering....

  69. anonymous
    • one year ago
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    kk

  70. Michele_Laino
    • one year ago
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    I think direct object, namely option A

  71. anonymous
    • one year ago
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    i htought the same thing... more?

  72. Michele_Laino
    • one year ago
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    ok!

  73. anonymous
    • one year ago
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    more?

  74. Michele_Laino
    • one year ago
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    ok!

  75. anonymous
    • one year ago
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    Which describes the underlined word in the sentence? The boys are (champions) at the game of chess. A. predicate nominative B. indirect object C. direct object D. predicate adjective

  76. anonymous
    • one year ago
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    i think its A

  77. Michele_Laino
    • one year ago
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    I'm pondering...

  78. anonymous
    • one year ago
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    kk

  79. Michele_Laino
    • one year ago
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    yes! that's right!

  80. anonymous
    • one year ago
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    Which describes the underlined word in the sentence? Rosalie loaned CINDY a vase for the flowers. A.direct object B.predicate adjective C.predicate nominative D.indirect object

  81. anonymous
    • one year ago
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    i think its D

  82. Michele_Laino
    • one year ago
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    yes! I think so!

  83. anonymous
    • one year ago
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    Which describes the underlined word in the sentence? Along with the flowers, Sally gave me a packet of seeds. A. predicate nominative B. indirect object C. predicate adjective D. direct object I think its B

  84. Michele_Laino
    • one year ago
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    please, what is the underlined part?

  85. anonymous
    • one year ago
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    me

  86. Michele_Laino
    • one year ago
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    yes! I confirm your option

  87. anonymous
    • one year ago
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    Which describes the underlined word in the sentence? The principal's voice is the SOUND of authority. A. indirect object B. predicate nominative C. predicate adjective D. direct object i think it's either B or D

  88. Michele_Laino
    • one year ago
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    I think direct object, namely option D

  89. Michele_Laino
    • one year ago
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    please wait

  90. Michele_Laino
    • one year ago
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    I think that the right option is B, namely "predicate nominative"

  91. anonymous
    • one year ago
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    Which word is the indirect object in this sentence? Since he hurt his foot, Corey gave her his skateboard to use. A. foot B. his C. Corey D. her

  92. anonymous
    • one year ago
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    @Michele_Laino

  93. anonymous
    • one year ago
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    @misty1212

  94. misty1212
    • one year ago
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    hi!

  95. misty1212
    • one year ago
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    what do you need help with?

  96. anonymous
    • one year ago
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    Which word is the indirect object in this sentence? Since he hurt his foot, Corey gave her his skateboard to use. A. foot B. his C. Corey D. her

  97. anonymous
    • one year ago
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    @misty1212 @Nnesha

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