Which of the following is an example of the associative property? a. 2(5 - 3) = 10 - 6
b. 1/3 · 3 = 1
c. -7 + (19 + 5) = (-7 + 19) + 5
d. 11 + (6 + 8) = 11 + (28 + 6)

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

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

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?