Ineed to rewrite the expression using addition, find the answer, then simplify but i don't know how. can someone explain this to me?

I'll just do 2 of them.

Remember that a positive minus a negative number is basically the positive plus positive. Example: 1-(-1) is equal to 1+1. The same goes for a positive plus a negative. Example: 1+(-1) = 1-1

For #4, we see 7-11. Using the rule, we can see that we can change this to    7+(-11).

For #11, the equation is -34-(-15)-(-18) so we can change this to:

-34+15+18. Always use the rule above!

the correct answer is a) they believe they have a "just cause."

islamic terrorists justify their violent actions because they believe they have a "just cause."

every act of terrorism of islamic sects is done “in the name of allah”. that justifies their actions. islam people who commit those terrorist attacks are not afraid to die. that is why the attacks have horrible consequences. they know they are going to die and they are proud to do it because it is in the name of allah, so it is justified and is for a “good cause.”

since the very beginning of the conflict with israel, islam is fighting a “sacred war”, respecting the words stated in the qur’an. they fight against the domination of the western countries and to defend their occupied territories.