It might be 0.133928571.....? I am unsure though. Sorry if this doesn't help
Answer:
maximum =6
amt boys = 3
amt girls =2
therefore expression =3+2=6
The third one is a point with the first equation.
I had to simplify the second equation.
It simplified to,

The second one with the above is didn't go through so I'd say no solution.
7mins 30 secs because if you do speed,distance,time then it is distance/speed then you get 7.5 and .5 of a minute that is 30 secs