What is the answer to 3a+4+B+2a+5+b

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

What is the lcm of 16 and 40 ? 24 and 40 ?

Which of the following can be used to explain a statement in a geometric proof?