Whats the formula for distance if i have time, acceleration and speed

If time (t), acceleration (a) and initial velocity (Vi) is given distance can be find by

S = (Vi) t + (1/2) at²

If both velocities initial velocity an final velocity is given then formula will be

2aS = (Vf) ² - (Vi²)

Where S is the distance.

Speed = Distance / Time.

For example: A car travels for 30 miles and it takes 2 hours. What speed was the car moving at?

I always convert my time into seconds unless the question says something else.

120 X 60 = 7,200

30/7200 = 0.00416667