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anonymous

  • one year ago

Did work!!!! But If you could check and see if my answers are right. Could you also show work, so I know isn't a guess.

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  1. anonymous
    • one year ago
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  2. SolomonZelman
    • one year ago
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    yes correct for #1

  3. SolomonZelman
    • one year ago
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    trust me I am not guessing:O

  4. anonymous
    • one year ago
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    Thanks, but can you show work pls.

  5. SolomonZelman
    • one year ago
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    Ok, \(\large\color{black}{ \displaystyle 47-(-68)=47+68=115 }\)

  6. anonymous
    • one year ago
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  7. SolomonZelman
    • one year ago
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    yes you are correct on #2, as well. Should I show why?

  8. anonymous
    • one year ago
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    no its ok. the next one is how i wanted you to show work, but its ok

  9. anonymous
    • one year ago
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  10. SolomonZelman
    • one year ago
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    Yes that is right as well.

  11. SolomonZelman
    • one year ago
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    (you already showed why)

  12. anonymous
    • one year ago
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    ok, let me draw out the next one

  13. anonymous
    • one year ago
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    Sorry took so long ...

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  14. SolomonZelman
    • one year ago
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    negative × negative = positive (you are incorrect)

  15. SolomonZelman
    • one year ago
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    \(\large\color{black}{ \displaystyle (-23)\times(-24)=(-1)^2\times 23\times 24=23\times 24 }\) I am just showing that for all positive number a and b, when you say: `(-a)•(-b)`, that will be the same as `a•b`.

  16. SolomonZelman
    • one year ago
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    Now, lets perform the multiplication

  17. SolomonZelman
    • one year ago
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    |dw:1440471613916:dw|

  18. SolomonZelman
    • one year ago
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    Is everything clear, or you have any questions?

  19. anonymous
    • one year ago
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    Yes, and I had tht on paper but i dont understand why i didnt get that when i drew it out on paper lol

  20. SolomonZelman
    • one year ago
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    maybe because you counted the 1 on top of the 2 in 23 twice.

  21. anonymous
    • one year ago
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    Yeah.

  22. SolomonZelman
    • one year ago
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    I am not sure how you got 652, but as long as you understand everything now, we are good

  23. anonymous
    • one year ago
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    okay

  24. anonymous
    • one year ago
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    Needed help...

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  25. SolomonZelman
    • one year ago
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    \(\rm :\color{blue}{D}\)

  26. SolomonZelman
    • one year ago
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    That symbol is division I suppose?

  27. SolomonZelman
    • one year ago
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    Not square root...

  28. anonymous
    • one year ago
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    k.

  29. SolomonZelman
    • one year ago
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    \(\large\color{black}{ \displaystyle 6.9~\div~0.03 }\)

  30. SolomonZelman
    • one year ago
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    Say you have some fraction: \(\large\color{black}{ \displaystyle \frac{A}{B} }\) So you can multiply top and bottom by some number, and the value doesn't change. In other words, \(\large\color{black}{ \displaystyle \frac{A}{B}=\frac{A\times x}{B\times x} }\)

  31. SolomonZelman
    • one year ago
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    do you agree?

  32. anonymous
    • one year ago
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    Yes.

  33. SolomonZelman
    • one year ago
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    Similarly, in our case: \(\large\color{black}{ \displaystyle \frac{6.9}{0.03}=\frac{6.9\times 100}{0.03\times 100}=\frac{690}{3} }\)

  34. SolomonZelman
    • one year ago
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    I am sure you can divide 690 by 3 in your head, without even involving a paper.

  35. anonymous
    • one year ago
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    230

  36. SolomonZelman
    • one year ago
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    Yup

  37. anonymous
    • one year ago
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  38. SolomonZelman
    • one year ago
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    your answer?

  39. anonymous
    • one year ago
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    It's a total of 20 questions, if you find this too much, you can tell me.

  40. anonymous
    • one year ago
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    Most of it I know so I'll just post the ones i need help on.

  41. SolomonZelman
    • one year ago
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    Ok, 104÷13 =?

  42. SolomonZelman
    • one year ago
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    do that and then add the negative sign to the result

  43. anonymous
    • one year ago
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    -8?

  44. SolomonZelman
    • one year ago
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    Yes, that is right

  45. anonymous
    • one year ago
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  46. SolomonZelman
    • one year ago
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    why 1/7 ?

  47. SolomonZelman
    • one year ago
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    remember that I said (-a)•(-b) is same as just a•b? Same applies to division: That is, (-a)÷(-b)=a÷b so what is 84÷12 ?

  48. anonymous
    • one year ago
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    7.

  49. SolomonZelman
    • one year ago
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    yes, 7 is correct

  50. anonymous
    • one year ago
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    Are are really nice to take the time out and help :)

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  51. SolomonZelman
    • one year ago
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    please take a shot

  52. anonymous
    • one year ago
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    I think its B, but just to check I posted.

  53. SolomonZelman
    • one year ago
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    yes, option B is correct (and the rest of the options are wrong).

  54. anonymous
    • one year ago
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    ok.

  55. anonymous
    • one year ago
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    Okay, problem here is i don't know what the two block things are

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  56. anonymous
    • one year ago
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    those

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  57. SolomonZelman
    • one year ago
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    Oh, these are absolute value bars

  58. anonymous
    • one year ago
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    oh...

  59. SolomonZelman
    • one year ago
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    Absolute value, one way to think of it: Say you have: "aboslute value of a" which is written as |a| |dw:1440473268072:dw|

  60. SolomonZelman
    • one year ago
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    so if you have |-a| then it will be also positive a.

  61. SolomonZelman
    • one year ago
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    for all a

  62. anonymous
    • one year ago
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    Ohhhh Now I get it. i NEVER knew what those were

  63. SolomonZelman
    • one year ago
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    But, absolute value is not relevant to the actual question tho'. Your balance after you spent 7$ more than what you had is 7 dollars less, and that is represented by -7.

  64. SolomonZelman
    • one year ago
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    It is not just 7, or not |7| or |-7|, because spending more than what you have is a negative 7 dollars on your account.

  65. anonymous
    • one year ago
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    Okay bare with me here.. I absolutly SUCK at box and whiskers

  66. anonymous
    • one year ago
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    I chose C btw

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  67. SolomonZelman
    • one year ago
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    Oh, it is 11:33 pm in my location. I am very late, I am sorry-:( I wasn't looking at the time this whole time, I really have to go, but you can tag other people to help, or open a new post.

  68. SolomonZelman
    • one year ago
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    @YellowFlowers__ this is how you tag

  69. SolomonZelman
    • one year ago
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    I apologize and wish you good luck

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