Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

juciystar234

  • 2 years ago

8- 6.2 divided by 5 + 7(0.91) help me please

  • This Question is Closed
  1. niduj123
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    13.3

  2. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    My textbook says 13.13 so I was wondering how they got that. Can you show me/ Tell me how you got that answer because I'm kinda confused...

  3. niduj123
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its easy bc its basic order of operations

  4. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yeah I know NVM :) thanks

  5. niduj123
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    can i hav a medal o.O

  6. niduj123
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    tyvm

  7. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    np

  8. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    for this:\[\frac{8- 6.2}{5 + 7(0.91)}\] you need to follow BODMAS - have you heard about that?

  9. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it is known by other names as well, see here: http://en.wikipedia.org/wiki/Order_of_operations

  10. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Ok let me check it out hold on

  11. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    look at the 2nd section "The standard order of operations"

  12. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Ok hold on hmm SO MANY WORDS!! D:

  13. niduj123
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol typical wikipedia

  14. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Ok I kinda got it

  15. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    (not really so much)

  16. niduj123
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    kwl i hope u pass :)

  17. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    good - so first thing to attack is the brackets

  18. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Thanks

  19. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Ok

  20. niduj123
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ^^...

  21. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    in this case the brackets just contain a number - so no actual operation to perform inside the brackets

  22. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  23. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    we can therefore remove the brackets to end up with:\[\frac{8- 6.2}{5 + 7(0.91)}=\frac{8- 6.2}{5 + 7*0.91}\]

  24. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    :p

  25. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Mhm ok

  26. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    hmmm ok im confused...

  27. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    lets jus concentrate on the denominator for now, we had:\[5+7(0.91)\]correct?

  28. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yes

  29. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now note that a(b) simply means a*b - agreed?

  30. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  31. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    agreed

  32. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so we can say that:\[5+7(0.91)=5+7*0.91\]

  33. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    does that make sense now?

  34. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok got tht

  35. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yes

  36. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    good - now what should the next set of operations be?

  37. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    we have handled the brackets

  38. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    um to multiply?>

  39. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    sorry didnt mean to put >

  40. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it should be exponents and roots next - but you do not have any here so we go to the next one: multiplication an division

  41. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yea!! Ok

  42. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so what is 7 * 0.91 = ?

  43. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Um hold on

  44. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    6.37

  45. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    correct, so now we end up with:\[\frac{8- 6.2}{5 + 7(0.91)}=\frac{8- 6.2}{5 + 7*0.91}=\frac{8- 6.2}{5 + 6.37}\]now most people get confused here because they think the next thing to do is the division

  46. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    wouldnt you add? or subtract?

  47. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    add?

  48. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    but what you need to remember is that you go through BODMAS for the numerator and the denominator seperately

  49. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  50. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    hang on a second - I think I misread your question

  51. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I believe it was this instead:\[8- 6.2 \div 5 + 7(0.91)\]

  52. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    am I right?

  53. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yes

  54. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    wait

  55. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yes

  56. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ok, sorry I originally interpreted it as:\((8- 6.2) \div (5 + 7(0.91))\)

  57. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ohhh ok

  58. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so lets start again - ok?

  59. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  60. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[8- 6.2 \div 5 + 7(0.91)\]first step - brackets to get:\[8- 6.2 \div 5 + 7(0.91)=8- 6.2 \div 5 + 7*0.91\]next is exponents/root but we have none next is multiplication/division - we have both, so you did 7*0.91 = 6.37\[8- 6.2 \div 5 + 6.37\]

  61. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thats how far we got

  62. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so next we should do what?

  63. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    add?

  64. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    or no subtract

  65. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    nope - have a closer look at what is still left

  66. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    like left to right but switch add with division

  67. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it should be division next

  68. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    so divide?

  69. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  70. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so what is 6.2 divided by 5 = ?

  71. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok hold on

  72. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    (a quick trick to divide by 5 is to divide by 10 and then halve the result)

  73. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1347581921786:dw|

  74. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    sorry i was drawing :P

  75. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that is not correct

  76. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    o.o

  77. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok :) so now how do i do it ? :|

  78. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the /quick/ method or using long division like you attempted up there?

  79. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    or like were did i mess up

  80. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    um i guess....

  81. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    go on

  82. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1347582167712:dw|

  83. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    oh

  84. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    i get it!!!

  85. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    my decimal messed me up..

  86. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the other way is 6.2 divided by 10 is 0.62 double that is 0.62 + 0.62 = 1.24 (sorry I incorrectly stated you halve the result up there - it should be double the result after dividing by 10)

  87. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Hmmm ok

  88. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ok, so we now have:\[8- 6.2 \div 5 + 6.37=8-1.24+6.37\]

  89. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the rest should now be straight forward

  90. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    so adding?

  91. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    sure

  92. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  93. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    but be careful with the signs

  94. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I got this part let me draw it for you

  95. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1347582462471:dw|

  96. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    remember the 1.24 has a minus sign next to it

  97. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so this is really "-1.24 + 6.37"

  98. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    no thats not a negative its a minus

  99. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so it might be better to first do "8 - 1.24"

  100. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  101. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    6.76?

  102. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    then add

  103. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    think of it in this way:\[8- 6.2 \div 5 + 6.37=8-1.24+6.37=8+(-1.24)+6.37\]

  104. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes add next

  105. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok so 13.13

  106. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I was trying to explain why you had to do "-1.24 + 6.37" previously

  107. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yaaa i got it my text book says that but i needed to work it out thank you!!!!!

  108. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes - that is the correct answer

  109. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok

  110. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yw :)

  111. juciystar234
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Thanks once again!! :D

  112. asnaseer
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    np :)

  113. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.