Answer:
Step-by-step explanation:
When an eagle gains the height, elevation of the eagle will be positive and when it goes down elevations will be negative.
Initial height of the eagle = 42 ft
Achieves the elevation = 144 ft
Goes down to 162 ft so the elevation will be = -162 ft
Gains the height again therefore, elevation of the eagle = 25 ft
Goes down to 65 feet so the elevation = -65 ft
Therefore, expression representing the eagle's flight will be,
(42 + 144 - 162 + 25 - 65)
Elevation at the brook = (42 + 144 - 162 + 25 - 65)
= 20 ft
