Which statement best classifies air?* 1 point
O Air is a pure substance because it is composed of pure substances.
O Air is a pure substance because its properties rarely change.
OAir is a mixture because it has the same properties at all times.
O Air is a mixture because its composition varies.

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

Identify the polynomial. a2b - cd3 a. monomial b. binomial c. trinomial d. four-term polynomial e. five-term polynomial

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)