Final answer:
The rental cost will be the same for both companies at 4 hours.
Step-by-step explanation:
To find the number of hours at which the rental cost will be the same for both companies, we need to set the expressions for the rental costs equal to each other:
25x + 250 = 50x + 150
Subtracting 25x and 150 from both sides gives:
100 = 25x
Dividing both sides by 25 gives:
4 = x
Therefore, the rental cost will be the same for both companies at 4 hours.