Y= 1/x-2 find the derivative

What is the slope of a line that is perpendicular to y = 3x + 1

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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