Which expressions represent a difference of squares? 3x2 - 9
4x2 - 12x + 9
25x2 - 36
1-16x²
49x2 + 4

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

Find the distance between the pair of points a(-1,8) and b(-8,4)

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .