Final answer:
Matthew and Juan will meet after 1.5 hours.
Step-by-step explanation:
First, let's determine the combined speed at which they approach each other.
Matthew runs at a speed of 5 miles per hour and Juan walks at a speed of 3 miles per hour.
To determine their combined speed, we add their individual speeds together:
Combined speed = 5 mph + 3 mph
= 8 mph
Now, we can use the formula:
Time = Distance / Speed
To find the time it takes for Matthew and Juan to meet.
Since they are 12 miles apart, we can divide this distance by their combined speed:
Time = 12 miles / 8 mph
= 1.5 hours
Therefore, Matthew and Juan will meet after 1.5 hours.