Given the functions: f(x)=7x g(x)=|x-2| h(x)=1/x-7 evaluate the function (f-g)(x) for x=3

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?