1700m is the correct answer
Just substitute the values: -1/-10-6 -> -1/-16 -> 1/16.
So 8x5=40 and 10×4=40 so you and your friend meet at the 40 th min
8 1/9 because 9 times 8 is 72 and 73-72=1 so 8 1/9
$25 a month :) (its too short so i hope you have a lovely day)