1. which number sentence shows the commutative property of addition? 9 + 3 = 12 9 + 3 = 3 + 9 3 + (9 + 1) = (3 + 9) + 1 3 * 9 = 27 2. use the commutative property of multiplication to identify which expression is equivalent to 6(2)(x). 12x 6(2x) 2(6)(x) 6 + 2 + x 3. use the commutative property to identify which expression is equal to (6+4)*5 5 * (6 + 4) 5 * 6 + 4 * 6 5 + (6 * 4) (6 + 4 * 5) 4. what is missing for the following quantity to be true? 9x + 3y +5a =3y + _ + 5a a. 10x b. 3y c. 9x d. 5a 5. which number sentence shows the associative property of addition? choose all that apply. a. 8 + (2 + 3) = (8 + 2) + 3 b. 3x(5 + 2) = 3x(5) + 3x(2) c. 8z + 9p = 9p + 8z d. (6 + 5) + 9 = 6 + (5 + 9)

Atrain traveled for 1.5 hours to the first station, stopped for 30 minutes, then traveled for 4 hours to the final station where it stopped for 1 hour. the total distance traveled is a function of time. which graph most accurately represents this scenario? a graph is shown with the x-axis labeled time (in hours) and the y-axis labeled total distance (in miles). the line begins at the origin and moves upward for 1.5 hours. the line then continues upward at a slow rate until 2 hours. from 2 to 6 hours, the line continues quickly upward. from 6 to 7 hours, it moves downward until it touches the x-axis a graph is shown with the axis labeled time (in hours) and the y axis labeled total distance (in miles). a line is shown beginning at the origin. the line moves upward until 1.5 hours, then is a horizontal line until 2 hours. the line moves quickly upward again until 6 hours, and then is horizontal until 7 hours a graph is shown with the axis labeled time (in hours) and the y-axis labeled total distance (in miles). the line begins at the y-axis where y equals 125. it is horizontal until 1.5 hours, then moves downward until 2 hours where it touches the x-axis. the line moves upward until 6 hours and then moves downward until 7 hours where it touches the x-axis a graph is shown with the axis labeled time (in hours) and the y-axis labeled total distance (in miles). the line begins at y equals 125 and is horizontal for 1.5 hours. the line moves downward until 2 hours, then back up until 5.5 hours. the line is horizontal from 5.5 to 7 hours