the first 5 is in the thousands place. The second 5 is in the hundredths place.
If you meant 12 1/4 inches long then your 4 feet and 1 inch long or 49 inches.
k = 18
the common difference d of an arithmetic sequence is
d = a₂ - a₁ = a₃ - a₂ = ....
a₂ - a₁ = 2k - 1 - k - 9 = k - 10 and
a₃ - a₂ = 2k + 7 - (2k - 1) = 2k + 7 - 2k + 1 = 8, hence
k - 10 = 8 ⇒ k = 8 + 10 = 18
the 3 consecutive terms are
27, 35, 43
Your system could be anything, just remember that input should be half than the output.
So, y ≥ 1/2x
5y ≥ 5/2x
10y ≥ 5x
Hope this helps!
