Pls help me with the question

In a school 2/3 of the students study a language of those who study a language 2/5 study french

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

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