Which number line model represents the expression 3 1/2 + (- 6)

Given: ac and db are diameters. m∠3=

Solve the system of equations. y= 2x y= x^2 - 15

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