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anonymous

  • one year ago

help please!

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  1. anonymous
    • one year ago
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    @Vocaloid

  2. anonymous
    • one year ago
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    Look at the following numbers: −2, −1, 0, 2 Which pair of numbers has a sum of 0? −1, 2 −2, 0 −2, 2 −1, 0

  3. anonymous
    • one year ago
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    Which of the following describes a situation in which the total distance a soccer player travels is zero meters from his starting point? The player runs 9 meters forward, and then runs 0 meters in the opposite direction. The player runs 5 meters forward, and then runs 6 meters in the opposite direction. The player runs 10 meters forward, and then runs 10 meters in the opposite direction. The player runs 6 meters forward, and then runs 5 meters in the opposite direction.

  4. anonymous
    • one year ago
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    @Vocaloid

  5. Vocaloid
    • one year ago
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    well, look at each of your answer choices... −1, 2 −2, 0 −2, 2 −1, 0 which answer choice adds up to 0?

  6. anonymous
    • one year ago
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    i already got that one. its c

  7. Vocaloid
    • one year ago
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    great

  8. anonymous
    • one year ago
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    and the other one?

  9. Vocaloid
    • one year ago
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    well, any thoughts?

  10. Vocaloid
    • one year ago
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    in order to get back where he started, he has to run the same distance in both directions

  11. anonymous
    • one year ago
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    c?

  12. Vocaloid
    • one year ago
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    yup

  13. anonymous
    • one year ago
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    @Vocaloid

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  14. Vocaloid
    • one year ago
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    hint: -10 - (-8) = -10 + 8 means we go 10 to the left, then 8 to the right

  15. anonymous
    • one year ago
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    um, i land on 6

  16. anonymous
    • one year ago
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    but theres no option for that answer.. @Vocaloid

  17. Vocaloid
    • one year ago
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    try again... -10 + 8 = ?

  18. anonymous
    • one year ago
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    -2

  19. Vocaloid
    • one year ago
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    right, so our answer is..?

  20. anonymous
    • one year ago
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    b?

  21. anonymous
    • one year ago
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    @Vocaloid

  22. Vocaloid
    • one year ago
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    yes

  23. anonymous
    • one year ago
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  24. Michele_Laino
    • one year ago
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    2+(-7), means that I have to shift to right by 2 units, then I have to go to left by 7 units

  25. anonymous
    • one year ago
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    so A?

  26. Michele_Laino
    • one year ago
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    so we have to move of 7 units from 2, to left

  27. Michele_Laino
    • one year ago
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    yes! correct!

  28. anonymous
    • one year ago
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  29. Michele_Laino
    • one year ago
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    6+(-7) means 6 units from origin to right and 7 units from the point x=6 to left

  30. anonymous
    • one year ago
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    so A?

  31. Michele_Laino
    • one year ago
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    no, since in A both displacements are to right

  32. anonymous
    • one year ago
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    oh sorry i meant b

  33. Michele_Laino
    • one year ago
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    correct!

  34. anonymous
    • one year ago
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    Which of the following uses absolute value correctly to show the distance between −30 and 16? |−30 − 16| = |−46| = −46 units |−30 − 16| = |−46| = 46 units |−30 + 16| = |−14| = 14 units |−30 + 16| = |−14| = −14 units

  35. Michele_Laino
    • one year ago
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    what is -30-16=...?

  36. anonymous
    • one year ago
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    -46

  37. Michele_Laino
    • one year ago
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    ok! now, please neglect the minus sign, what do you get?

  38. anonymous
    • one year ago
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    so it would be b because the value is always positive

  39. Michele_Laino
    • one year ago
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    yes!

  40. anonymous
    • one year ago
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    )Sandra is showing her work in simplifying (3.3 − 4.2) − 2.8 + 5.7. Identify any error in her work or reasoning. Step 1: (3.3 − 4.2) − 2.8 + 5.7 Step 2: 3.3 + (− 4.2 − 2.8) + 5.7 (distributive property) Step 3: 3.3 − 7 + 5.7 Step 4: 3.3 + 5.7 − 7 (commutative property) Step 5: 9 − 7 = 2 She wrote commutative instead of associative in Step 4. She wrote distributive instead of associative in Step 2. She wrote commutative instead of distributive in Step 4. She wrote distributive instead of commutative in Step 2.

  41. Michele_Laino
    • one year ago
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    at the step #2 the applied property is not the distributive property

  42. anonymous
    • one year ago
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    is it b?

  43. Michele_Laino
    • one year ago
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    yes! we have applied the associative property

  44. anonymous
    • one year ago
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    What is the sign of the product (−5)(−2)(−7)(−6)? Positive, because the products (−5)(−2) and (−7)(−6) are negative and the product of two negative numbers is positive Positive, because the products (−5)(−2) and (−7)(−6) are positive and the product of two positive numbers is positive Negative, because the products (−5)(−2) and (−7)(−6) are negative and the product of two negative numbers is negative Negative, because the products (−5)(−2) and (−7)(−6) are positive and the product of two positive numbers is negative

  45. Michele_Laino
    • one year ago
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    by the way, why you posted in history section?

  46. anonymous
    • one year ago
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    oh i dont know sorry , ill change that after.. lol

  47. Michele_Laino
    • one year ago
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    lol :)

  48. Michele_Laino
    • one year ago
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    we have the subsequent rule: \[\Large \left( - \right) \cdot \left( - \right) = + \]

  49. Michele_Laino
    • one year ago
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    so we have: \[\Large \left\{ {\left( - \right) \cdot \left( - \right)} \right\} \cdot \left\{ {\left( - \right) \cdot \left( - \right)} \right\} = + \cdot + = + \]

  50. anonymous
    • one year ago
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    b?

  51. Michele_Laino
    • one year ago
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    correct!

  52. anonymous
    • one year ago
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  53. Michele_Laino
    • one year ago
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    we can write this: \[\Large \left( {\frac{{ - 1}}{2}} \right) \cdot \left( {\frac{{ - 1}}{2}} \right) = \left( { - \frac{1}{2}} \right) \cdot \left( { - \frac{1}{2}} \right) = ...?\] also use the previous rule: \[\Large \left( - \right) \cdot \left( - \right) = + \]

  54. anonymous
    • one year ago
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    c?

  55. Michele_Laino
    • one year ago
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    yes!

  56. anonymous
    • one year ago
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  57. Michele_Laino
    • one year ago
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    we can write this: \[\Large \begin{gathered} - 5\frac{1}{4} = - \left( {5 + \frac{1}{4}} \right) = - \frac{{20 + 1}}{4} = ...? \hfill \\ \hfill \\ - 7\frac{1}{2} = - \left( {7 + \frac{1}{2}} \right) = - \frac{{14 + 1}}{2} = ...? \hfill \\ \end{gathered} \] please complete

  58. anonymous
    • one year ago
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    so i do this : 21/4 * 15/2

  59. Michele_Laino
    • one year ago
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    no, the single results are correct, nevertheless we have to do this: \[ \Large - 5\frac{1}{4} - \left\{ { - 7\frac{1}{2}} \right\} = - \frac{{21}}{4} + \frac{{15}}{2} = \frac{{ - 21 + \left( {2 \cdot 15} \right)}}{4} = ...?\]

  60. Michele_Laino
    • one year ago
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    \[\large - 5\frac{1}{4} - \left\{ { - 7\frac{1}{2}} \right\} = - \frac{{21}}{4} + \frac{{15}}{2} = \frac{{ - 21 + \left( {2 \cdot 15} \right)}}{4} = ...?\]

  61. anonymous
    • one year ago
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    i got 9/4

  62. Michele_Laino
    • one year ago
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    now, please complete this computation: \[\Large 2\frac{1}{4} = 2 + \frac{1}{4} = \frac{{\left( {2 \cdot 4} \right) + 1}}{4} = ...?\]

  63. anonymous
    • one year ago
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    i got 9/4

  64. Michele_Laino
    • one year ago
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    then what is the right option?

  65. anonymous
    • one year ago
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    A?

  66. Michele_Laino
    • one year ago
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    correct!

  67. anonymous
    • one year ago
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    is 2 and 1/4 positive or negative?

  68. anonymous
    • one year ago
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    @Michele_Laino

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