ANSWER
C. 30 miles
Step-by-step explanation
Allen is taking a 150 mile trip and he has already driven for 2 hours at an average speed of 60 miles per hour.
To find how many miles he will still need to drive, we have to first find how many miles he has driven.
We have that:
Therefore, we have that the distance he has driven is:
distance = 60 * 2
distance = 120 miles
Now, we subtract the distance he has driven from the total distance of the trip. That is:
Distance remaining = 150 - 120
Distance remaining = 30 miles
He will still need to drive 30 miles.