The sequencing of activities is often based upon dependencies between the activities. the dependencies that should guide activity sequencing can be either:

a. critical or non-critical
b. opportunities or threats
c. mandatory or discretionary
d/ interior or exterior

C

Explanation:

Mandatory or discretiinary

A mandatory dependency is one that must happen at a particular time. It is usually requirement of some kind based on contracts, laws, company procedures, physical limitations, etc. When the sequence of events is developed for various aspects of the process, mandatory dependencies are placed where they must happen.

A discretionary dependency is one that isn't based on a must, but on a should. These decisions are usually based upon best practices, business knowledge, preferences etc.When the sequence of events is developed they are placed where the team members would like them to occur

x=3

step-by-step explanation:

this is really simple i saw that there was only one term (5x) and thought if that was 15 what would i have to multiply everything else to get it there? well if 5x became 15 then x would have to be 3 so plug the 3 in the x for the other equations and you get 15 for the other ones. so there you go. : )