17 pieces given length of the ribbon
Answer:
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.5 .5 x<u>></u>2
●________>
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0 1 2 3 4
If 1 line completely overlaps the other line, they are the same line with infinite solutions.....so ur answer would be the 4th one
This is an Arithmetic Progression with 1st term 11 and common difference d=6
Number of Rows Number of seats Common difference " d"
----------------------- ----------------------- -------------------------------------
1st a₁ = 11
2nd a₁+d =17 d =2nd - 1st = 6
3rd a₁ +2d = 23 d =3rd - 2nd = 6
4th a₁ +3d = 29 d= 4th - 3rd = 6
-------------------------------------------------------------------------------
nth ROW a(n) = a₁ + (n-1)d
18th ROW a₁₈ = 11 + (18-1).6 = 11+(17)(6) = 113
General equation to predict the number of seat an the nth row:
Number of seats in nth row = a₁ + (n-1).d
Answer:28
Step-by-step explanation: in this case n=4, so you would plug in 4 into the equation: 5(4)+8 which equals 8
