What is the additive inverse of 7x-20

The solution set for 5v2 – 125 = 0 is

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .