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anonymous

  • one year ago

help :)

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  1. anonymous
    • one year ago
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  2. M_M13
    • one year ago
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    what's your question? :)

  3. anonymous
    • one year ago
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    @Michele_Laino

  4. Michele_Laino
    • one year ago
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    we have: 3/2= 1.5, and 3/4 = 0.75

  5. anonymous
    • one year ago
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    so c!

  6. Michele_Laino
    • one year ago
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    correct!

  7. anonymous
    • one year ago
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    next!

  8. anonymous
    • one year ago
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    Peter earned $180 working at a store during the summer months. He bought 4 books worth $12 each from his earnings at the store. How much money was left after he bought the books? $33 $42 $132 $228

  9. Michele_Laino
    • one year ago
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    the remaining money is: \(180-48=...?\)

  10. Michele_Laino
    • one year ago
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    since he spent \(12 \cdot 4=48$\)

  11. anonymous
    • one year ago
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    132

  12. Michele_Laino
    • one year ago
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    ok!

  13. anonymous
    • one year ago
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    c?

  14. Michele_Laino
    • one year ago
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    of course!

  15. anonymous
    • one year ago
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    ok next! :)

  16. anonymous
    • one year ago
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    Ada is showing her work in simplifying (5.9 – 1.8) – 6.2 + 4.1. In which step did Ada make an error? Step 1: (5.9 – 1.8) – 6.2 + 4.1 Step 2: 5.9 + (–1.8 – 6.2) + 4.1 (associative property) Step 3: 5.9 – 8 + 4.1 Step 4: 5.9 + 4.1 – 8 (associative property) Step 5: 10 – 8 = 2 Step 2; she wrote associative instead of commutative Step 2; she wrote associative instead of distributive Step 4; she wrote associative instead of commutative Step 4; she wrote associative instead of distributive

  17. Michele_Laino
    • one year ago
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    when I swap two operands, I'm applying the commutative property

  18. anonymous
    • one year ago
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    A?

  19. Michele_Laino
    • one year ago
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    I think A is a wrong option

  20. anonymous
    • one year ago
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    c?

  21. Michele_Laino
    • one year ago
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    correct!

  22. anonymous
    • one year ago
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    next!

  23. Michele_Laino
    • one year ago
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    next please

  24. anonymous
    • one year ago
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  25. anonymous
    • one year ago
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    A?

  26. Michele_Laino
    • one year ago
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    please wait a moment, I have to answer to my phone

  27. anonymous
    • one year ago
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    ok :)

  28. Michele_Laino
    • one year ago
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    ok! I'm here

  29. Michele_Laino
    • one year ago
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    we can write this: \[2\frac{1}{9} - \left( { - 4\frac{1}{3}} \right) = - \frac{{19}}{9} + \frac{{13}}{3} = \frac{{ - 19 + 39}}{9} = ...?\]

  30. anonymous
    • one year ago
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    20

  31. anonymous
    • one year ago
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    20 / 9 ?

  32. Michele_Laino
    • one year ago
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    oops... \[ - 2\frac{1}{9} - \left( { - 4\frac{1}{3}} \right) = - \frac{{19}}{9} + \frac{{13}}{3} = \frac{{ - 19 + 39}}{9} = ...?\]

  33. Michele_Laino
    • one year ago
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    correct!

  34. Michele_Laino
    • one year ago
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    now, we have: \[20:9 = 2 \cdot 9 + 2\]

  35. anonymous
    • one year ago
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    20

  36. Michele_Laino
    • one year ago
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    being: \[20:9 = 2 \cdot 9 + 2\] what is the right option?

  37. anonymous
    • one year ago
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    A?

  38. Michele_Laino
    • one year ago
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    correct!

  39. Michele_Laino
    • one year ago
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    oops.. I have made an error, the right expression is: \[20 = 2 \cdot 9 + 2\]

  40. anonymous
    • one year ago
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    right A?

  41. Michele_Laino
    • one year ago
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    yes!

  42. anonymous
    • one year ago
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    ok next! :)

  43. anonymous
    • one year ago
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    What is the sign of the product (–5)(–3)(–8)(–6)? Positive, because the products (–5)(–3) and (–8)(–6) are negative, and the product of two negative numbers is positive Positive, because the products (–5)(–3) and (–8)(–6) are positive, and the product of two positive numbers is positive Negative, because the products (–5)(–3) and (–8)(–6) are negative, and the product of two negative numbers is negative Negative, because the products (–5)(–3) and (–8)(–6) are positive, and the product of two positive numbers is negative

  44. Michele_Laino
    • one year ago
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    hint: you have to apply the sign rule: \(- \cdot -=+\)

  45. Michele_Laino
    • one year ago
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    and: \( + \cdot +=+\)

  46. anonymous
    • one year ago
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    b?

  47. Michele_Laino
    • one year ago
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    correct!

  48. anonymous
    • one year ago
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    Sally swam a total distance of 3 and 1 over 2 miles during the months of November and December. If Sally only swam 1 over 4 of a mile every day, which expression shows the number of days she went swimming? 3 and 1 over 2 ⋅ 1 over 4 3 and 1 over 2 ÷ 1 over 4 3 and 1 over 2 + 1 over 4 3 and 1 over 2 – 1 over 4

  49. Michele_Laino
    • one year ago
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    we have to divide the total distance by the unit distance

  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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    Michelle bought 2 tickets to a zoo. After she bought the tickets, her account balance showed a change of –$33.04. What would have been the change to Michelle's account balance had she only bought 1 ticket to the zoo? –$16.52 $16.52 $16.50 –$16.50

  53. Michele_Laino
    • one year ago
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    since two ticket cost 33.04$ then one ticket costs: \(33.04: 2=...?\)

  54. Michele_Laino
    • one year ago
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    tickets*

  55. anonymous
    • one year ago
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    16.52

  56. Michele_Laino
    • one year ago
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    correct!

  57. anonymous
    • one year ago
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    next!

  58. anonymous
    • one year ago
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    wait is it A?

  59. Michele_Laino
    • one year ago
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    yes!

  60. anonymous
    • one year ago
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    oh ok next! :)

  61. anonymous
    • one year ago
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    Which of the following describes a situation in which the total distance a hockey player travels is 0 meter from his starting point? The player skates 0 meter forward and then skates 8 meters in the opposite direction. The player skates 9 meters forward and then skates 8 meters in the opposite direction. The player skates 12 meters forward and then skates 0 meter in the opposite direction. The player skates 12 meters forward and then skates 12 meters in the opposite direction.

  62. anonymous
    • one year ago
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    d?

  63. Michele_Laino
    • one year ago
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    yes!

  64. anonymous
    • one year ago
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    Which of the following correctly uses absolute value to show the distance between –60 and 11? |–60 – 11| = |–71| = –71 units |–60 + 11| = |–49| = 49 units |–60 + 11| = |–49| = –49 units |–60 – 11| = |–71| = 71 units

  65. Michele_Laino
    • one year ago
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    total distance is given by the absolute value of the difference between your values

  66. anonymous
    • one year ago
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    d?

  67. Michele_Laino
    • one year ago
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    yes!

  68. anonymous
    • one year ago
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    Jinni opened a bank account. She deposited $87.60 into her account every month for 10 months. She used $25.60 every month to pay for music classes. After 10 months, she used 1 over 4 of the total money left in her account to go to a summer camp for musicians. What is the total amount of money Jinni spent to go to the summer camp? $64.00 $88.00 $155.00 $620.00

  69. Michele_Laino
    • one year ago
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    deposited money is \(87.60 \cdot 10=...?\)

  70. anonymous
    • one year ago
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    876

  71. Michele_Laino
    • one year ago
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    the spent money is: \(25.6 \cdot 10 =...? \)

  72. anonymous
    • one year ago
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    256

  73. Michele_Laino
    • one year ago
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    the remaining money is: \(876-256=...? \)

  74. anonymous
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    620

  75. Michele_Laino
    • one year ago
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    and 1 over 4 of 620 is: \(620:4=...?\)

  76. anonymous
    • one year ago
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    ok so d?

  77. Michele_Laino
    • one year ago
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    please what is \(620 :4 =...? \)

  78. anonymous
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    620

  79. Michele_Laino
    • one year ago
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    I got \(620 :4 = 155 \), am I right?

  80. anonymous
    • one year ago
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    yes

  81. Michele_Laino
    • one year ago
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    so, what is the right option?

  82. anonymous
    • one year ago
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    c?

  83. Michele_Laino
    • one year ago
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    correct!

  84. anonymous
    • one year ago
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    next! :)

  85. anonymous
    • one year ago
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  86. Michele_Laino
    • one year ago
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    what is: \[\frac{{36}}{2} = ...?\]

  87. Michele_Laino
    • one year ago
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    \(36:2=...?\)

  88. anonymous
    • one year ago
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    18

  89. Michele_Laino
    • one year ago
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    and \(54:3=...?\)

  90. anonymous
    • one year ago
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    18

  91. Michele_Laino
    • one year ago
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    and \(90:5=...?\)

  92. anonymous
    • one year ago
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    every single one is 18 :)

  93. Michele_Laino
    • one year ago
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    yes!

  94. anonymous
    • one year ago
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    The regular price of a hooded jacket is $25.75. During a sale, the jacket was marked as 20% off. What was the approximate price of the jacket during the sale? $5.15 $20.60 $21.62 $23.75

  95. Michele_Laino
    • one year ago
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    the discount is: \(25.75 \cdot 0.2=...?\)

  96. anonymous
    • one year ago
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    A?

  97. Michele_Laino
    • one year ago
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    no, it is the first step

  98. anonymous
    • one year ago
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    oh okay 5.15

  99. Michele_Laino
    • one year ago
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    ok! So the requested price is: \(25.75-5.15=...?\)

  100. anonymous
    • one year ago
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    20.6

  101. Michele_Laino
    • one year ago
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    correct!

  102. anonymous
    • one year ago
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    Jade measured the height of an art frame as 5.23 feet, but the actual height was 6 feet. What is the percent of error in Jade's measurement? 12.83% 13.55% 14.72% 15.55%

  103. Michele_Laino
    • one year ago
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    the requested percentage error is given by this computation: \[\frac{{6 - 5.23}}{6} \cdot 100 = ...?\]

  104. anonymous
    • one year ago
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    12.833333

  105. Michele_Laino
    • one year ago
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    correct! \(12.83 \%\)

  106. anonymous
    • one year ago
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    The price of apples at a farm is $1.99 per pound. Which equation can be used to determine c, the total price of n pounds of apples? c = 1.99 over n c = 1.99n c = 1.99 + n c = 1.99 − n

  107. Michele_Laino
    • one year ago
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    if 1 pound costs \( 1.99 \$ \) then 2 pounds cost \( 1.99 \cdot 2\), 3 pounds cost \( 1.99 \cdot 3\), four pounds cost \( 1.99 \cdot 4\)

  108. anonymous
    • one year ago
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    b?

  109. Michele_Laino
    • one year ago
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    yes!

  110. Michele_Laino
    • one year ago
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    please, now I have to go to have my dinner, see you tomorrow :)

  111. anonymous
    • one year ago
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    wait... i only have 5 more quick questions.. please help :)

  112. Michele_Laino
    • one year ago
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    only one question, since I have to go to have my dinner

  113. anonymous
    • one year ago
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    Lisa surveyed 60 students at her school and found that 0.85 of the students she surveyed said their favorite class is math. Another 15% of the students she surveyed reported that their favorite class is science. How many more students in the survey prefer math over science? 9 15 35 42

  114. Michele_Laino
    • one year ago
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    students who prefer class of math are: \(60 \cdot 0.85=...?\)

  115. anonymous
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    51

  116. Michele_Laino
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    students who prefer class of science are: \(60 \cdot 0.15=...?\)

  117. anonymous
    • one year ago
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    9

  118. Michele_Laino
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    and the requested difference is: \(51-9=...?\)

  119. anonymous
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    42

  120. Michele_Laino
    • one year ago
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    correct! ok! see you tomorrow :)

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