powershell - Add Days to predefined date -

i'm looking way add days predefined date in format mm/dd/yyyy.

basically trying automate process looks @ predefined date , adds 30 days , runs series of commands. searching around i've done has examples use current date, none predefined dates.

pretty simple:

([datetime]'07/10/2015').adddays(30) 

first cast string representing date .net system.datetime object use object's adddays method. note: when specifying type names powershell can omit initial system. - if want.