Final answer:
Ashley and Miranda slide across the snow together on the inner tube at a speed of 6.7 m/s.
Step-by-step explanation:
To find the combined speed of Ashley and Miranda sliding across the snow together on the inner tube, we can add their individual velocities.
Ashley's velocity is +2.3 m/s and Miranda's velocity is +4.4 m/s. Adding these velocities results in a combined velocity of 6.7 m/s.
Therefore, the two of them slide across the snow together on the inner tube at a speed of 6.7 m/s.