Answer:
vivimos
Step-by-step explanation:
IR endings in present tense are: 
YO ⇢ O
TU ⇢ ES
EL/ELLA ⇢ E
NOSOTROS ⇢ IMOS
ELLOS ⇢ EN
1.) take off the ir in vivir and you will be left with (viv)
2.) Based on who is talking (nosotros ⇢ imos) 
 we add that ending (imos) to the end of (viv)
ANSWER: vivimos 
Have a awesome day and study hard to get out of spanish class lol