17/24
31
24
31
There are very many possible solutions. The simplest polynomial solution is t(n) = (n^4 - 14n^3 + 71n^2 + 14n + 24)/24.
y = 7x - 4
it is 17 because if you say 31 -14 =17 .... 17+14=31
The nth term in the arithmetic progression 10, 17, 25, 31, 38... will be equal to 7n + 3.
31
17/24
The nth term is 7n-4 and so the next number in the sequence is 31
31
24
31
17 actually.
20-16, 55-10, 20-19, 37-24, 52-17, 30-13, 49-26, 27-17, 35-21, 31-24, 34-19,
Subtract 7 from each number, so the 9th number would be 59.