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anonymous

  • one year ago

help!

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  1. anonymous
    • one year ago
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    Andrew is showing his work in simplifying (−5.7 + 2.2) − 1.1. Step 1: (2.2 − 5.7) − 1.1 Step 2: 2.2 − (5.7 + 1.1) Step 3: 2.2 − (6.8) Step 4: −4.6 Which statement is true? In step 1, Andrew used the commutative property. In step 2, Andrew used the distributive property. In step 3, Andrew used the associative property. In step 4, Andrew's answer is incorrect. @Vocaloid

  2. Vocaloid
    • one year ago
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    well, he switched the 2.2 and the -5.7, do you know what property that is?

  3. anonymous
    • one year ago
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    commutative?

  4. Vocaloid
    • one year ago
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    yup!

  5. anonymous
    • one year ago
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    so A is the answer?

  6. anonymous
    • one year ago
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    @Vocaloid

  7. Vocaloid
    • one year ago
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    yes

  8. anonymous
    • one year ago
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  9. Vocaloid
    • one year ago
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    two hints: 1. subtract the two numbers 2. distance must be positive that should be enough to find the answer

  10. anonymous
    • one year ago
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    C?

  11. Vocaloid
    • one year ago
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    subtract...

  12. anonymous
    • one year ago
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    A?

  13. anonymous
    • one year ago
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    @Vocaloid

  14. Vocaloid
    • one year ago
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    yup, much better

  15. anonymous
    • one year ago
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    )Which statement best explains the value of 12 − (−4)? The additive inverse of −4 is −4, so 12 − (−4) = 16. The additive inverse of −4 is −4, so 12 − (−4) = 8. The additive inverse of −4 is +4, so 12 − (−4) = 8. The additive inverse of −4 is +4, so 12 − (−4) = 16.

  16. Vocaloid
    • one year ago
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    well, when we take the additive inverse, we switch the sign so -4 becomes +4 and 12 -(-4) becomes 12 + 4

  17. anonymous
    • one year ago
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    d?

  18. Vocaloid
    • one year ago
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    yes

  19. anonymous
    • one year ago
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  20. anonymous
    • one year ago
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    @Vocaloid

  21. Vocaloid
    • one year ago
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    just multiply -3/16 times 4

  22. anonymous
    • one year ago
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    -0.75

  23. Vocaloid
    • one year ago
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    as a fraction, please...

  24. anonymous
    • one year ago
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    oh okay sorry

  25. anonymous
    • one year ago
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    -3 /4

  26. Vocaloid
    • one year ago
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    yes, that's your answer

  27. anonymous
    • one year ago
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    Where is the answer to the expression 5 − 9 located on a horizontal number line? 9 units to the left of 5 9 units to the right of 5 4 units to the right of 5 4 units to the left of 5

  28. anonymous
    • one year ago
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    @Vocaloid

  29. anonymous
    • one year ago
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    -4

  30. Vocaloid
    • one year ago
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    actually, let's think of it another way 5-9 means start at 5 and go left 9

  31. anonymous
    • one year ago
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    so A?

  32. anonymous
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    @Vocaloid

  33. anonymous
    • one year ago
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    @Vocaloid

  34. Vocaloid
    • one year ago
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    right

  35. anonymous
    • one year ago
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    The total charge on 4 particles is −36 units. All the particles have the same charge. What is the charge on each particle? −9 units −8 units 8 units 9 units

  36. Vocaloid
    • one year ago
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    divide: total charge/number of particles

  37. anonymous
    • one year ago
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    -9? @Vocaloid

  38. Vocaloid
    • one year ago
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    yes

  39. anonymous
    • one year ago
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  40. Vocaloid
    • one year ago
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    well, -6-(-4) = ?

  41. anonymous
    • one year ago
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    -2 @Vocaloid

  42. Vocaloid
    • one year ago
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    right, now take a look at your answer choices and see which one matches -2

  43. anonymous
    • one year ago
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    b?

  44. Vocaloid
    • one year ago
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    right

  45. anonymous
    • one year ago
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    Why is 1 + (−5) equal to −4? Because it is 5 units to the right of 1 on a horizontal number line Because it is 5 units to the left of 0 on a horizontal number line Because it is 5 units to the right of 0 on a horizontal number line Because it is 5 units to the left of 1 on a horizontal number line

  46. anonymous
    • one year ago
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    @Vocaloid

  47. anonymous
    • one year ago
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    @Vocaloid

  48. anonymous
    • one year ago
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    @Vocaloid

  49. anonymous
    • one year ago
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    @Vocaloid

  50. Vocaloid
    • one year ago
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    1 + (-5) means start at 1 and go left 5

  51. anonymous
    • one year ago
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    d? @Vocaloid

  52. Vocaloid
    • one year ago
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    right

  53. anonymous
    • one year ago
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    Which fraction is equivalent to negative 7 over 8? 8 over negative 7 7 over negative 8 negative 7 over negative 8 7 over 8

  54. Vocaloid
    • one year ago
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    hint: move the negative sign to the denominator

  55. anonymous
    • one year ago
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    b?

  56. anonymous
    • one year ago
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    @Vocaloid

  57. Vocaloid
    • one year ago
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    right

  58. anonymous
    • one year ago
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  59. anonymous
    • one year ago
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    @Vocaloid

  60. Vocaloid
    • one year ago
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    alright, we start with 35, and take away the price of the book and magazine using additive inverses, our equation should look like: 35 + (-price of book) + (-price of magazine)

  61. anonymous
    • one year ago
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    i got 23 @Vocaloid

  62. Vocaloid
    • one year ago
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    now look at the answer choices and see which one matches...

  63. anonymous
    • one year ago
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    c? @Vocaloid

  64. Vocaloid
    • one year ago
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    yes

  65. anonymous
    • one year ago
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    @Vocaloid

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  66. Vocaloid
    • one year ago
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    well, all you need to do is divide the two fractions (-6/3) divided by (2)/(-9) = ?

  67. anonymous
    • one year ago
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    @Vocaloid

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  68. Vocaloid
    • one year ago
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    look at the answer choices first now, our answer will be (total miles) divided by (distance per day) which answer choices matches that description?

  69. anonymous
    • one year ago
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    b

  70. Vocaloid
    • one year ago
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    yes

  71. anonymous
    • one year ago
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    Ryan has a shelf that is 64 over 3 inches wide. How many magazines can Ryan arrange on the shelf if each magazine is 4 over 3 inches thick? 28, because the number of magazines is 64 over 3 ÷ 4 over 3 27, because the number of magazines is 64 over 3 • 4 over 3 16, because the number of magazines is 64 over 3 ÷ 4 over 3 43, because the number of magazines is 64 over 3 ⋅ 4 over 3

  72. anonymous
    • one year ago
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    @Vocaloid

  73. Vocaloid
    • one year ago
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    hint: number of magazines = (width of shelf)/(thickness of magazine)

  74. anonymous
    • one year ago
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    A? @Vocaloid

  75. Vocaloid
    • one year ago
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    check your math again

  76. anonymous
    • one year ago
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    D

  77. Vocaloid
    • one year ago
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    (64/3) divided by (4/3) = ?

  78. anonymous
    • one year ago
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  79. Vocaloid
    • one year ago
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    plug each of them on a calculator and pick the two that don't repeat

  80. anonymous
    • one year ago
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    what do you mean.. can you give me an example please? @Vocaloid

  81. Vocaloid
    • one year ago
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    start with the first number... 7/4 type 7/4 into a calculator and see if the decimal stops or repeats

  82. anonymous
    • one year ago
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    Abel opened a bank account. He deposited $63.50 into his account every month for 20 months. He used $40.50 every month to pay for comic books. After 20 months, he used 1 over 2 of the total money left in his account to go to a comic book convention. What is the total amount of money Abel spent to go to the convention? $230.00 $248.00 $460.00 $920.00 @Vocaloid

  83. Vocaloid
    • one year ago
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    ok... he saves 63.50 and spends 40.50 per month, so how much money does he have left every month?

  84. anonymous
    • one year ago
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    what is the equation for me to solve @Vocaloid

  85. Vocaloid
    • one year ago
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    I want you to think hard about this one... he saves $63.50 and spends $40.50... how much money does he have left?

  86. anonymous
    • one year ago
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    ok i got c @Vocaloid

  87. Vocaloid
    • one year ago
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    nope, not quite... he has 460 in his account and he spends half on the convention, so how much does he spend on the convention?

  88. anonymous
    • one year ago
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    b? @Vocaloid

  89. Vocaloid
    • one year ago
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    check again... what is half of 460?

  90. anonymous
    • one year ago
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    A?

  91. Vocaloid
    • one year ago
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    right

  92. anonymous
    • one year ago
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    Michelle earned $150 during the summer for babysitting. She bought 2 packs of Blu-ray disks worth $65 each using her babysitting money. How much money was left after she bought the Blu-ray disks? $20 $85 $215 $280

  93. Vocaloid
    • one year ago
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    what do you think? she starts with 150 and buys two items worth 65 each

  94. anonymous
    • one year ago
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    Tiara's gym membership, which is $42, is deducted automatically from her bank account every month. Which expression shows the total deductions for the year? (−$42) ÷ 12 (−$42) + 12 (−$42) − 12 (−$42) ⋅ 12

  95. anonymous
    • one year ago
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    @Vocaloid

  96. Vocaloid
    • one year ago
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    total deductions = (-monthly deduction)*number of months

  97. anonymous
    • one year ago
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    okay

  98. anonymous
    • one year ago
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    An underground subway elevator descends 12% of the total depth every minute. The total depth of the elevator is 75 meters below the ground. How many meters below the ground is the elevator after 2 minutes? –18 meters –9 meters –4.5 meters –22.5 meters @Vocaloid

  99. Vocaloid
    • one year ago
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    first calculate 12% of 75 (0.12*75) = ?

  100. anonymous
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    i got 9 @Vocaloid

  101. anonymous
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    @Vocaloid

  102. Vocaloid
    • one year ago
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    right, so in 1 minute it is -9 meters now, what about 2 minutes?

  103. anonymous
    • one year ago
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    -18

  104. anonymous
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    @Vocaloid

  105. Vocaloid
    • one year ago
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    right

  106. anonymous
    • one year ago
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    @Vocaloid

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  107. Vocaloid
    • one year ago
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    step 1, the division changed to multiplication without flipping the second fraction

  108. anonymous
    • one year ago
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    @Vocaloid

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  109. Vocaloid
    • one year ago
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    (3/5) divided by (-4/9) = ?

  110. anonymous
    • one year ago
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    7/45

  111. anonymous
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    @Vocaloid

  112. Vocaloid
    • one year ago
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    check your math again rmember, when we divide two fractions, we flip the second fraction over (3/5) / (-4/9) = (3/5)*(9/4) = ?

  113. Vocaloid
    • one year ago
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    (3/5) / (-4/9) = (3/5)*(-9/4) = ?

  114. anonymous
    • one year ago
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    oh! i got 27/20

  115. anonymous
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    is it negative or postitive?

  116. Vocaloid
    • one year ago
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    (3/5)*(-9/4) = -27/20 because of the negative sign on -9

  117. anonymous
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    ok!

  118. anonymous
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  119. anonymous
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    @Vocaloid

  120. Vocaloid
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    hint: the negative sign disappeared somewhere, what step did it disappear in?

  121. anonymous
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    step 2 @Vocaloid

  122. anonymous
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    @Vocaloid

  123. Vocaloid
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    correct, so there's the error

  124. anonymous
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    Tucker earned $12.50 walking dogs on Saturday. On Sunday, he spent $6.95 when he purchased a movie ticket. He needed to borrow money from a friend to complete his purchase of a snack. How much money did Tucker pay for the snack if he owes his friend $5? $5.55 $7.50 $10.55 $24.45 @Vocaloid

  125. anonymous
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    @Vocaloid

  126. Vocaloid
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    alright... ignore the snack for now, just answer this first he started off with 12.50 and spent 6.95, how much does he have left?

  127. anonymous
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    5.55 @Vocaloid

  128. Vocaloid
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    right, now we need to add 5 to that to find the price of the snack

  129. anonymous
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  130. anonymous
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    @Vocaloid

  131. Vocaloid
    • one year ago
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    again, we'll be using division number of servings = (total number of cups)/(serving size) look at the answer choices and see which one matches

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