Anyone? not to good at this will mark you as brainlist

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

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

If g^-1(x) is the inverse of g (x) which statement must be true