To me, the pattern is that B is always 5 more than A. So if N is 15, then the answer will be 20. Hope I could help
The answer is $32.57 first i took 289 divided by 22 to get miles per gallon and then i took that times 2.48 and I got 32.57. Did this make sense?
5+3n=21-n
2n=16
n=8 times in a row