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like1234

  • one year ago

What property is shown? –12 + (27 + 12) = –12 + (12 + 27) A. associative property B. commutative property C. distributive property D. opposite of a sum property

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  1. like1234
    • one year ago
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    Will medal!!!!!!!!!!

  2. like1234
    • one year ago
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    I think B

  3. anonymous
    • one year ago
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    The answer would be commutative because it changes order.

  4. like1234
    • one year ago
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    ok thx!

  5. like1234
    • one year ago
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    so is the answer for this on B Which is an example of the commutative property? A. –13 + 27 = 27 + (–13) B. –21 + (11 + 13) = (–21 + 11) + 13 C. 4(–3 + 5) = 4(–3) + 4 ∙ 5 D. –(–8 + 3) = 8 + (–3)

  6. mathstudent55
    • one year ago
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    commutative: change of order associative: change of grouping

  7. like1234
    • one year ago
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    ok thx!

  8. mathstudent55
    • one year ago
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    distributive: a(b + c) = ab + ac

  9. anonymous
    • one year ago
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    Associative property keeps the order but changes the parentheses.

  10. like1234
    • one year ago
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    ok...................

  11. like1234
    • one year ago
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    so am i correct???

  12. mathstudent55
    • one year ago
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    |dw:1443637653761:dw|

  13. anonymous
    • one year ago
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    No its not B. B is associative property

  14. like1234
    • one year ago
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    Oh

  15. mathstudent55
    • one year ago
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    Commutative property is a change of order. Here is the general way of stating the commutative property of addition: a + b = b + a

  16. like1234
    • one year ago
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    wit what problem is this for?

  17. like1234
    • one year ago
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    *wait

  18. anonymous
    • one year ago
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    I am talking about the second problem

  19. like1234
    • one year ago
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    ok

  20. mathstudent55
    • one year ago
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    For the second problem, in B., the 11 and 13 were grouped together on the left side. On the right side, the -21 and 11 are grouped together. This is a change of grouping, so B is associative, not commutative.

  21. like1234
    • one year ago
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    so for communicative u have 2 change the whole thing?

  22. mathstudent55
    • one year ago
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    You need to find a statement that is an example of a + b = b + a, which is commutative.

  23. like1234
    • one year ago
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    OH

  24. mathstudent55
    • one year ago
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    It is not "communicative." Communicative means you like to communicate. It is "commutative." Commutative means you change, as in change the order.

  25. like1234
    • one year ago
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    ok im confused for communicative u change the order the opposite

  26. like1234
    • one year ago
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    wit my problem is commutative property not communicative

  27. like1234
    • one year ago
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    *wait

  28. mathstudent55
    • one year ago
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    Commutative: See if one of the choices shows this: (first number) + (second number) = (second number) + (first number)

  29. like1234
    • one year ago
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    oh i see thx

  30. like1234
    • one year ago
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    so A then right?

  31. mathstudent55
    • one year ago
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    Commutative property of addition. (first number) + (second number) = (second number) + (first number) a + b = b + a Example: 3 + 5 = 5 + 3

  32. mathstudent55
    • one year ago
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    Correct. A is the answer.

  33. like1234
    • one year ago
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    k

  34. like1234
    • one year ago
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    thx sooooo much

  35. mathstudent55
    • one year ago
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    You're welcome.

  36. like1234
    • one year ago
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    What value of q makes the statement true? –(q + 14) = –3 + (–14) A. –17 B. –3 C. 3 D. 17

  37. mathstudent55
    • one year ago
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    yw

  38. like1234
    • one year ago
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    i now it has 2 be 3 but im not sure if it is -3 or 3

  39. like1234
    • one year ago
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    @mathstudent55

  40. like1234
    • one year ago
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    @KAKES1967

  41. like1234
    • one year ago
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    I think just 3

  42. mathstudent55
    • one year ago
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    Let's use the distributive property first on the left side. –(q + 14) = –3 + (–14) -q + (-14) = -3 + (-14)

  43. mathstudent55
    • one year ago
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    Now you see that -q must equal -3 That means q = 3, not -3

  44. mathstudent55
    • one year ago
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    You are correct. q = 3

  45. anonymous
    • one year ago
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    Yes you are correct but let @mathstudent55 explain to you why its that

  46. like1234
    • one year ago
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    thx guys!

  47. mathstudent55
    • one year ago
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    yw

  48. like1234
    • one year ago
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    ok last thing Use an addition property to solve for b. –12 + 16 = 16 + b A. –28 B. –12 C. 4 D. 12

  49. like1234
    • one year ago
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    i think B

  50. anonymous
    • one year ago
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    Correct

  51. like1234
    • one year ago
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    thx

  52. mathstudent55
    • one year ago
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    You want b alone on the right side. Since 16 is being added to b, you need to add something to 16 to make it zero. Additive inverses add to zero.

  53. anonymous
    • one year ago
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    Its using communative property

  54. like1234
    • one year ago
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    Got 100% thx sooooooooo much u guys really helped

  55. anonymous
    • one year ago
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    Your welcome :P

  56. anonymous
    • one year ago
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    Good job

  57. mathstudent55
    • one year ago
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    If you add -16 to 16 you get zero because -16 is the additive inverse of 16. The rule with an equation is you must add the same to both sides of the equation. Since you need to add -16 to the right side, you must add -16 to the left side too.

  58. like1234
    • one year ago
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    ok

  59. mathstudent55
    • one year ago
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    |dw:1443638612995:dw|

  60. mathstudent55
    • one year ago
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    |dw:1443638712071:dw|

  61. like1234
    • one year ago
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    ok thx so much

  62. like1234
    • one year ago
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    :)

  63. mathstudent55
    • one year ago
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    As you can see, b = -12, as you had written. Good job!

  64. mathstudent55
    • one year ago
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    yw

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