Adiver starts out at 480 feet below the surface (or −480 feet). she then swims upward 248 feet. use a signed number to represent the diver's current depth.

-232 ft

Step-by-step explanation:

Going further down from where she is will be negative and going up from where she is will be positive.  So if she starts at -480 and swims upwards, she is moving in a positive direction.  The addition problem is

-480 + 248

which comes out to -232.  She is still 232 feet below the surface.

go and ask your mom to you

the answer is simply just 6n add the two together as they have an n