So if 5 rides cost 13.50 then we divide to find the cost of one which would be 2.70 for one ride. So u do 2.70 x 7 = 18.90 and 2.70 x 10 is 27$.
So for 7 rides it would be 18.90$ and for 10 rides it is 27$
11. We do the same thing again 2.70 x 12 = 32.40$
So c is $32.40 and that would be 12 rides