Final answer:
The distance from the library to the beach is 7 miles, found by subtracting the distance from home to the library (5 miles) from the total distance traveled (12 miles).
Step-by-step explanation:
Reshanda rode her bike a total of 12 miles, starting from home to the library, and then to the beach. The distance from Reshanda's house to the library is 5 miles. To find the distance from the library to the beach, we subtract the distance from the house to the library from the total distance.
The calculation is as follows: Total Distance (from home to beach) - Distance from Home to Library = Distance from Library to Beach.
So, 12 miles - 5 miles = 7 miles. Therefore, the distance from the library to the beach is 7 miles.