Respuesta :
Answer:
-69
Step-by-step explanation:
If he is below sea level it would be negative so -86+17=-69
-69
it swam 86 meters below sea level so -86 then it swam up 17 meters so -89+17=-69. hope this helped
it swam 86 meters below sea level so -86 then it swam up 17 meters so -89+17=-69. hope this helped