Answer:
Explanation:
To find the distance between Dianna's house and Helen's house on Allie's number line, we need to calculate the absolute value of the difference between their locations.
Dianna's house is marked at -11.7, and Helen's house is marked at 3.9.
To find the distance between the two points, we subtract the coordinates:
3.9 - (-11.7) = 3.9 + 11.7 = 15.6
The absolute value of 15.6 is 15.6.
Therefore, the distance between Dianna's house and Helen's house on Allie's number line is 15.6 units.