The high school graduating class of 2010 was 260 people. five years later the high school graduating class was 320 people. by approximately what percentage did the high school graduating class change?

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

Icould really use some with this question.