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zarkam21

  • one year ago

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  1. zarkam21
    • one year ago
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  2. FireKat97
    • one year ago
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    okay so starts from 5 so we know that 5 is a constant which is added on... now try writing "four less than twice the previous line" as an expression. Let l be the number of marbles in the previous line

  3. zarkam21
    • one year ago
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    12-4

  4. zarkam21
    • one year ago
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    is it 6?

  5. raymonde20
    • one year ago
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    Yep. I got 6 as well.

  6. zarkam21
    • one year ago
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    But thts not a choice :/

  7. FireKat97
    • one year ago
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    wait how did you guys get 6?

  8. zarkam21
    • one year ago
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    I did 2x-4 and but 6 in for x

  9. FireKat97
    • one year ago
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    But you forgot to add the 5 constant

  10. FireKat97
    • one year ago
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    because the line initially starts at 5 marbles

  11. zarkam21
    • one year ago
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    so 11

  12. zarkam21
    • one year ago
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    ?

  13. FireKat97
    • one year ago
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    Im gonna try and find a better way to explain this, my explanation is getting messy

  14. zarkam21
    • one year ago
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    Alright thanks

  15. FireKat97
    • one year ago
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    I think the easiest way to do it is to follow the pattern... because I can't find any AP/GP or linear relationship, though there probably is a bette way to do it but anyway this is what I would use... so line 1: 5 marbles (we are told this) line 2: 2(5) -4 = 6 line 3: 2(6) - 4 : 8 and so on.... till you get to line 6

  16. zarkam21
    • one year ago
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    14?

  17. zarkam21
    • one year ago
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    I just put 36.

  18. FireKat97
    • one year ago
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    Yeah I got 36 too

  19. phi
    • one year ago
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    the rule is 2*n - 4 where n is the number of marks in the previous line if you count the number of marks in line 4, you get 12 to find the number of marks in line 5, do 2*12 - 4 that simplifies to 20 now find the number of marks in line 6: 2*20 - 4 = 40-4= 36

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