270/2 1/2 = 108. This means they are delivering 108 leaflets an hour. Then you divide 405 by 108 and get 3.75, which is 3 hours and 3 quarters of an hour. since a quarter of an hour is 15 minutes it would be 3 hours 45 minutes.
if you bring over the -2 you will get y=1/2(x+5)+2 ... the number outside the parentheses stays they way it is and it’s the y. However, the number inside the parentheses becomes the opposite of what it is and is the x.