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anonymous

  • one year ago

Four expressions are shown below: 21x + 6 3(7x + 2) 18x + 9 3(6x + 3) Which two expressions are equivalent to 3(6x + 2 + x)? A and D C and D A and B B and C

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  1. anonymous
    • one year ago
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    i believe one of them is C

  2. Nnesha
    • one year ago
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    3(6x + 2 + x) combine like terms

  3. Nnesha
    • one year ago
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    C is 18x+9 what is common factor ?

  4. anonymous
    • one year ago
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    I don't think it is C

  5. anonymous
    • one year ago
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    common factor 6?

  6. Nnesha
    • one year ago
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    GREATEST common factor.

  7. Nnesha
    • one year ago
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    18 and 9 are divisible by 6,3, and ?

  8. anonymous
    • one year ago
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    9

  9. Nnesha
    • one year ago
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    yes right so take out 9 (????) what would goe in the parentheses ?

  10. Nnesha
    • one year ago
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    when you take out 9 from 18x what will u have left ?

  11. anonymous
    • one year ago
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    um 6?

  12. Nnesha
    • one year ago
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    in other words you have to divide both terms by common factor |dw:1438796637464:dw|

  13. Nnesha
    • one year ago
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    18x/9= ? 9/9= ?

  14. anonymous
    • one year ago
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    9 and 1

  15. Nnesha
    • one year ago
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    18x divide by 9 = 9 ?

  16. anonymous
    • one year ago
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    i really don't know..

  17. anonymous
    • one year ago
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    oh 2

  18. anonymous
    • one year ago
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    sorry its 2

  19. Nnesha
    • one year ago
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    2x

  20. anonymous
    • one year ago
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    yes

  21. Nnesha
    • one year ago
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    |dw:1438796981240:dw| now tell me is it equivalent to 3(6x + 2 + x)?

  22. Nnesha
    • one year ago
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    \[\huge\rm 3(\color{ReD}{6x}+2+\color{red}{x})\]combine like terms

  23. anonymous
    • one year ago
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    Yes its equivalent

  24. anonymous
    • one year ago
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    nvm its not

  25. Nnesha
    • one year ago
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    yes right

  26. Nnesha
    • one year ago
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    \(\color{blue}{\text{Originally Posted by}}\) @Nnesha \[\huge\rm 3(\color{ReD}{6x}+2+\color{red}{x})\]combine like terms \(\color{blue}{\text{End of Quote}}\) combine them let mek now what you get

  27. anonymous
    • one year ago
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    i thought its equivalent because 6x3=18 and 6+3=9

  28. Nnesha
    • one year ago
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    you don't have to combine 6+3

  29. Nnesha
    • one year ago
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    distribute parentheses by outside term to check ur answer

  30. Nnesha
    • one year ago
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    first of all 3(6x+2+x) here what are like terms in the parentheses ? combine them you will get one of answer

  31. anonymous
    • one year ago
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    3 is a like term

  32. Nnesha
    • one year ago
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    no i said in the parenthess

  33. anonymous
    • one year ago
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    6x

  34. Nnesha
    • one year ago
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    and ?

  35. Nnesha
    • one year ago
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    \(\color{blue}{\text{Originally Posted by}}\) @Nnesha \(\color{blue}{\text{Originally Posted by}}\) @Nnesha \[\huge\rm 3(\color{ReD}{6x}+2+\color{red}{x})\]combine like terms \(\color{blue}{\text{End of Quote}}\) look at that i changed the color of both like terms

  36. anonymous
    • one year ago
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    x

  37. Nnesha
    • one year ago
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    yes right so combine them 6x+1x=?

  38. anonymous
    • one year ago
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    7x

  39. Nnesha
    • one year ago
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    yes right so 3(6x+2+x) is 3(7x+2)

  40. Nnesha
    • one year ago
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    now look at the answer choices which one is equivlent to 3(7x+2)

  41. anonymous
    • one year ago
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    C

  42. Nnesha
    • one year ago
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    alright distribute parenthesses by 3 3(7x+2) = ??? is it equivalent to 18x+9 ?

  43. anonymous
    • one year ago
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    i know now

  44. anonymous
    • one year ago
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    A and b because they both = 27

  45. Nnesha
    • one year ago
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    distributive property a(b+c) =a times b + a times c =ab+ac

  46. Nnesha
    • one year ago
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    they both 27 ?

  47. Nnesha
    • one year ago
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    you CAN"T combine 21x+6 they are not LIKE terms

  48. Nnesha
    • one year ago
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    21x is not same as 6 ^^x variable ^without any variable

  49. anonymous
    • one year ago
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    ok sorry i messed up nvm scratch that

  50. Nnesha
    • one year ago
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    3(7x+2) distribute |dw:1438798106649:dw|

  51. Nnesha
    • one year ago
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    your explanation isn't correct.

  52. anonymous
    • one year ago
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    3(7x+2) = ??? is it equivalent to 18x+9 ? Yes there equivalent

  53. Nnesha
    • one year ago
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    show your work.

  54. anonymous
    • one year ago
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    ok

  55. anonymous
    • one year ago
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    7x+2= 9 3x9=27 18x+9=27 they both equal 27

  56. anonymous
    • one year ago
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    am i wrong?

  57. Nnesha
    • one year ago
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    first of how did you get 9 how 7x+2 equal to 9 ?

  58. Nnesha
    • one year ago
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    2nd i just told you can't combine a number with variable with number without variable like 18x+9=27 18 have x variable but 9 doesn't so they are not like terms

  59. Nnesha
    • one year ago
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    \[\huge\rm 3(6x+2+x)=3(7x+2)\] so which answer choices is same as 3(7x+2) ?

  60. anonymous
    • one year ago
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    ok then clearly i am confused on what im doing

  61. anonymous
    • one year ago
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    21x + 6 it has a variable so you can combine it

  62. Nnesha
    • one year ago
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    do you mean combine 21x and 6 ?

  63. anonymous
    • one year ago
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    no i mean 3(7x+2) and 21x + 6 they both have a variable so you can combine them

  64. Nnesha
    • one year ago
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    you need two expression that are equivalent to 3(6x+2+x) (same as 3(7x+2) now you can see one of answer choice is 3(7x+2) so 3(7x+2) is equivalent to 3(7x+2)

  65. Nnesha
    • one year ago
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    they both are different equation you don't have to combine them

  66. Nnesha
    • one year ago
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    |dw:1438798858408:dw| 3(7x+2) is same as ??? distribute 7x and 2 by 3

  67. Nnesha
    • one year ago
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    \[\huge\rm \color{ReD}{3}(7x+2)=\color{reD}{3} \times 7x + \color{ReD}{3} \times 2\] = ??

  68. anonymous
    • one year ago
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    before i do this 7x is just like saying 3x7 right or no?

  69. Nnesha
    • one year ago
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    yes right (3 times 7)x

  70. anonymous
    • one year ago
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    ok then i got 27

  71. Nnesha
    • one year ago
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    3 times 7x = 27x ?

  72. anonymous
    • one year ago
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    ok im confused on the x isnt it just 3 x 7 which is 21?

  73. Nnesha
    • one year ago
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    here are some example of like terms 4x+3x=7x 4y+4y= 8y 4x+3 isn't equal to 7x no! you can't combine 4x with 3 they are not like terms

  74. Nnesha
    • one year ago
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    4x+3 is just 4x+3

  75. Nnesha
    • one year ago
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    yes 3 times 7x =21x

  76. Nnesha
    • one year ago
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    3 times 2 = 6 right ? |dw:1438799303607:dw| so 3(7x+2) is equivalent to 21x+6

  77. anonymous
    • one year ago
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    yes

  78. anonymous
    • one year ago
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    so 27x is the answer

  79. Nnesha
    • one year ago
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    how ??

  80. anonymous
    • one year ago
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    ohhh

  81. Nnesha
    • one year ago
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    21x+6 is just 21x+6 you CAN'T combine them they are NOT LIKE terms

  82. Nnesha
    • one year ago
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    http://www.purplemath.com/modules/polydefs2.htm here read

  83. anonymous
    • one year ago
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    i see im not suppose to do anything after that i was doing 21x+6=27x i thought i had to finish the problem...

  84. Nnesha
    • one year ago
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    no you can't combine 21x+6 its just like making milkshake of mangoes and onion

  85. anonymous
    • one year ago
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    i see *lightbulb

  86. anonymous
    • one year ago
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    i wasn't thinking in that way

  87. Nnesha
    • one year ago
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    so can you combine 4z+5y (example ) ??

  88. anonymous
    • one year ago
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    no because there not like terms

  89. Nnesha
    • one year ago
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    true good!

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