zarkam21
  • zarkam21
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Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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zarkam21
  • zarkam21
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FireKat97
  • FireKat97
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
zarkam21
  • zarkam21
12-4

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zarkam21
  • zarkam21
is it 6?
raymonde20
  • raymonde20
Yep. I got 6 as well.
zarkam21
  • zarkam21
But thts not a choice :/
FireKat97
  • FireKat97
wait how did you guys get 6?
zarkam21
  • zarkam21
I did 2x-4 and but 6 in for x
FireKat97
  • FireKat97
But you forgot to add the 5 constant
FireKat97
  • FireKat97
because the line initially starts at 5 marbles
zarkam21
  • zarkam21
so 11
zarkam21
  • zarkam21
?
FireKat97
  • FireKat97
Im gonna try and find a better way to explain this, my explanation is getting messy
zarkam21
  • zarkam21
Alright thanks
FireKat97
  • FireKat97
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
zarkam21
  • zarkam21
14?
zarkam21
  • zarkam21
I just put 36.
FireKat97
  • FireKat97
Yeah I got 36 too
phi
  • phi
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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