The diver is 25.6 feet under sea level so they need to come back up 25.6 feet to reach sea level again. The answer is 25.6 feet.
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5) 74.925
6) 470
i think this is correct but i'm not completely sure
Elga's age = x
Alvin's age = x + 7
x + x + 7 = 97.
Simplify the left side of the equation
2x + 7 = 97.
Subtract 7 from each side
2x = 90.
Divide each side by 2
x = 45
Since x is equal to Elga's age, Elga is 45 years old