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anonymous

  • one year ago

The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is the number of combos sold and f(x) is the amount of profit. Part A: Determine the vertex. What does this calculation mean in the context of the problem? (5 points) Part B: Determine the x-intercepts. What do these values mean in the context of the problem? (5 points) CAN YOU GVM THE ANSWERS PLEASE

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  1. anonymous
    • one year ago
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    @jim_thompson5910

  2. anonymous
    • one year ago
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    @jim_thompson5910 ARE STILL THERE?

  3. jim_thompson5910
    • one year ago
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    what do you have so far?

  4. anonymous
    • one year ago
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    The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is the number of combos sold and f(x) is the amount of profit. Part A: Determine the vertex. What does this calculation mean in the context of the problem? (5 points) Part B: Determine the x-intercepts. What do these values mean in the context of the problem? (5 points)

  5. jim_thompson5910
    • one year ago
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    you already posted that

  6. anonymous
    • one year ago
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    yea can you help me its my last question?

  7. jim_thompson5910
    • one year ago
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    |dw:1436488305187:dw|

  8. jim_thompson5910
    • one year ago
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    |dw:1436488324499:dw|

  9. jim_thompson5910
    • one year ago
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    |dw:1436488354162:dw|

  10. jim_thompson5910
    • one year ago
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    oops I meant to say "a = -1"

  11. anonymous
    • one year ago
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    Part A: -1? Part B: 44? Part C: -384?

  12. jim_thompson5910
    • one year ago
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    no

  13. anonymous
    • one year ago
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    THATS THE ANSWERS?

  14. jim_thompson5910
    • one year ago
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    a,b,c that i listed are the coefficients not the answers

  15. jim_thompson5910
    • one year ago
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    have you seen \[\Large y = ax^2 + bx + c\] before?

  16. jim_thompson5910
    • one year ago
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    btw there is no part c

  17. anonymous
    • one year ago
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    OH YEA MY Bad, so i need to solve that problem?

  18. jim_thompson5910
    • one year ago
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    if a = -1 and b = 44 then what is \(\LARGE \frac{-b}{2a}\) equal to?

  19. anonymous
    • one year ago
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    a=2 and b=2 ?

  20. jim_thompson5910
    • one year ago
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    \[\Large \frac{-b}{2a} = \frac{-44}{2*(-1)} = ??\]

  21. anonymous
    • one year ago
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    22?

  22. jim_thompson5910
    • one year ago
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    yes, so x = 22 is where the vertex is plug x = 22 into the original equation to find y

  23. anonymous
    • one year ago
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    so whats nexts? i need to find y?

  24. jim_thompson5910
    • one year ago
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    yes

  25. jim_thompson5910
    • one year ago
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    |dw:1436488910837:dw|

  26. anonymous
    • one year ago
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    -342?

  27. jim_thompson5910
    • one year ago
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    incorrect

  28. jim_thompson5910
    • one year ago
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    you should have gotten -1*(22)^2+44(22) - 384 = 100

  29. jim_thompson5910
    • one year ago
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    when x = 22, y = 100

  30. jim_thompson5910
    • one year ago
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    |dw:1436489230679:dw|

  31. anonymous
    • one year ago
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    oh ok, so whats next?

  32. jim_thompson5910
    • one year ago
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    `What does this calculation mean in the context of the problem? ` what does the vertex tell us?

  33. anonymous
    • one year ago
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    (22, 100)?

  34. jim_thompson5910
    • one year ago
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    yeah what does it mean in the real world? how does it translate into english?

  35. jim_thompson5910
    • one year ago
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    if you're stuck, what does x represent in this problem?

  36. anonymous
    • one year ago
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    twenty-two

  37. jim_thompson5910
    • one year ago
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    go back up at the top what does it say x represents? `where x is the...`

  38. anonymous
    • one year ago
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    x = 22 ?

  39. jim_thompson5910
    • one year ago
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    look at the instructions. It tells you what x means

  40. jim_thompson5910
    • one year ago
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    I don't want the number

  41. jim_thompson5910
    • one year ago
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    `The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is _________ and f(x) is _____________.`

  42. anonymous
    • one year ago
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    vertex?

  43. jim_thompson5910
    • one year ago
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    do you see what I mean? by asking to look at the instructions

  44. jim_thompson5910
    • one year ago
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    Fill in the blanks `The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is _________ and f(x) is _____________.`

  45. jim_thompson5910
    • one year ago
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    scroll to the very top of the page. You posted these instructions up there

  46. anonymous
    • one year ago
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    where x is the "number of combos sold" and f(x) is the amount of profit

  47. jim_thompson5910
    • one year ago
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    good

  48. jim_thompson5910
    • one year ago
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    when we say x = 22 and y = 100 that means when 22 combos are sold, the profit is 100 dollars

  49. anonymous
    • one year ago
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    oh

  50. jim_thompson5910
    • one year ago
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    (22,100) is the vertex at the highest point, so the most profit we can get is $100 and that happens when 22 combos are sold

  51. jim_thompson5910
    • one year ago
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    this is usually where managers want to aim

  52. anonymous
    • one year ago
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    so that the answer for part A?

  53. jim_thompson5910
    • one year ago
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    yeah all so far for A

  54. anonymous
    • one year ago
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    OR THAT only one part?

  55. jim_thompson5910
    • one year ago
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    we found the vertex and then gave an explanation of what it really means

  56. anonymous
    • one year ago
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    ok thank you and for part B?

  57. jim_thompson5910
    • one year ago
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    solve 0 = -x^2 + 44x - 384 for x you can use technology (graphing) or the quadratic formula

  58. anonymous
    • one year ago
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    Part A:(22,100) is the vertex at the highest point, so the most profit we can get is $100 and that happens when 22 combos are sold Part B:?

  59. jim_thompson5910
    • one year ago
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    part b) solve 0 = -x^2 + 44x - 384 for x you can use technology (graphing) or the quadratic formula

  60. jim_thompson5910
    • one year ago
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    desmos is a good graphing calculator https://www.desmos.com/calculator

  61. jim_thompson5910
    • one year ago
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    type in -x^2 + 44x - 384 then look for the x intercepts

  62. anonymous
    • one year ago
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    TYPE IN THE CALCULATOR?

  63. jim_thompson5910
    • one year ago
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    you see where the input box is?

  64. anonymous
    • one year ago
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    NO :/

  65. jim_thompson5910
    • one year ago
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  66. anonymous
    • one year ago
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    OH OKAY WAIT LET ME SEE

  67. anonymous
    • one year ago
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    1?

  68. jim_thompson5910
    • one year ago
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  69. anonymous
    • one year ago
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    OH IN THAT CALCULATOR I DONT KNOW HOW TO PUT X^2

  70. jim_thompson5910
    • one year ago
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    do you see the points (12,0) and (32,0) ?

  71. anonymous
    • one year ago
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    yes

  72. jim_thompson5910
    • one year ago
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    you just put in x^2 like you typed

  73. jim_thompson5910
    • one year ago
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    it understands that notation

  74. jim_thompson5910
    • one year ago
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    (12,0) and (32,0) are the x-intercepts x-intercept (12,0) when x = 12, the value of y is 0 so when 12 combos are sold, the profit is $0 x-intercept (32,0) when x = 32, the value of y is 0 so when 32 combos are sold, the profit is $0

  75. jim_thompson5910
    • one year ago
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    anything in between x = 12 and x = 32 means you'll have positive profits otherwise you will have 0 profit or negative profit (you lose money or owe it)

  76. anonymous
    • one year ago
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    lose?

  77. jim_thompson5910
    • one year ago
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    negative profit = you lost money ie you spent more than what you made

  78. jim_thompson5910
    • one year ago
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    example you send $10 but you only make $6 so you lost $4 (6-10 = -4)

  79. anonymous
    • one year ago
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    oh yea

  80. anonymous
    • one year ago
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    so?

  81. jim_thompson5910
    • one year ago
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    we're practically done with the problem

  82. jim_thompson5910
    • one year ago
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    `Part B: Determine the x-intercepts. What do these values mean in the context of the problem?` the x-intercepts are 12 and 32. As ordered pairs they are (12,0) and (32,0). They represent the points where the profit is $0. This is where you break even. You don't gain any money and you don't lose any money.

  83. anonymous
    • one year ago
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    so thats the asnwer for part B?

  84. jim_thompson5910
    • one year ago
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    more or less

  85. anonymous
    • one year ago
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    ANSWER*

  86. anonymous
    • one year ago
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    LESS?

  87. jim_thompson5910
    • one year ago
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    huh? I don't know what you mean? I'm basically saying "yes"

  88. anonymous
    • one year ago
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    OH I THINK YOU ARE ASK ME IS MORE OR LESS

  89. jim_thompson5910
    • one year ago
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    ignore that portion

  90. anonymous
    • one year ago
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    SO WHAT WITH NEED TO DO NOW?

  91. anonymous
    • one year ago
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    WE*

  92. jim_thompson5910
    • one year ago
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    you're done, the problem is over

  93. anonymous
    • one year ago
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    SO WAIT THE ANSWER FOR PART B ITS: MORE OR LESS?

  94. jim_thompson5910
    • one year ago
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    no

  95. jim_thompson5910
    • one year ago
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    I already gave it to you. Just go back and re-read it

  96. anonymous
    • one year ago
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    the x-intercepts are 12 and 32. As ordered pairs they are (12,0) and (32,0). They represent the points where the profit is $0. This is where you break even. You don't gain any money and you don't lose any money.

  97. anonymous
    • one year ago
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    ???

  98. jim_thompson5910
    • one year ago
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    yeah just put that into your own words. Hopefully you understand what I mean?

  99. anonymous
    • one year ago
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    IN my own words? i dont know

  100. anonymous
    • one year ago
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    @jim_thompson5910 ???

  101. jim_thompson5910
    • one year ago
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    you can do it

  102. anonymous
    • one year ago
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    no please i can please i don't speak good english

  103. anonymous
    • one year ago
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    :(

  104. jim_thompson5910
    • one year ago
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    Give it your best shot. Just be confident.

  105. anonymous
    • one year ago
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    so wait i need to write the answer in my own?

  106. anonymous
    • one year ago
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    with my own letters?

  107. jim_thompson5910
    • one year ago
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    yes

  108. anonymous
    • one year ago
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    thankss for you help

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