Respuesta :
Solution:
The fish is swimming 5 feet under the water surface will be represented below as
[tex]=-5ft[/tex]5 feet take negative because the fish is swimming below the surface of the water.
The fish then descends 10 feet down,This can be represented below also
[tex]=-10ft[/tex]10 feet take negative because the fish descends
The fish then ascends (goes up) by 4 feet
This can be represented below as
[tex]=+4ft[/tex]Concept:
To calculate the depth of the fish means to add up all the depth
By applying the concept, we will have
[tex]\begin{gathered} =(-5ft)+(-10ft)+(+4ft) \\ =-5ft-10ft+4ft \\ =-15ft+4ft \\ =-11ft \end{gathered}[/tex]Hence,
The fish is 11 feet under the water surface
