we're going to at 2:32 which means that we're going to going this direction on the number line that'll take a strop21 adding 30 to will take us back to 11 so we are at 11 on the number line and now we’re going to take away a negative amount taking away 400-051
at negative amount is appositive thing so one of the ways that I remember that is I will use this minus sign right here to turn this into a plus sign and if I use it goes away so it's no longer there and so now I met whatever my answer was plus 9 and 11 plus nine is going to lose me in this direction and that's going to make it the final answer being 20 perhaps another way that might help you remember how to deal with taking away a negative thing I do that another way that I do that is taking away negative saying is appositive thing alright what are the measurements below click on the stop sign well let's see the distance from here to here is one inch it's divided into 16 equal marks and those 16 marcher called sixteenths.
http://examguidez.com/400-051-ccie-collaboration/