Answer:Here's how to solve this: - Let 'x' represent the entire trip.- We know 1/5 of the trip is 8 miles. This can be written as (1/5) * x = 8 miles.- To find the whole trip (x), we need to isolate 'x'. Multiply both sides of the equation by 5:(1/5) * x * 5 = 8 miles * 5- This simplifies to x = 40 miles Therefore, the birds' entire trip was 40 miles.