The line segment joining the points a (3,2) and b (5,1) is divided at the point p in the ratio 1: 2 and p lies on the line 2x-18y+k=0. find the value of k

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post