A dolphin is swimming 3 feet below sea level. It dives down 9 feet to catch some fish. Then the dolphin swims 4 feet up toward the surface with its catch. What is the dolphin’s final elevation relative to sea level?

btw its not -8 I tried to see if it was but I guess it wasn't

-5

Step-by-step explanation:

7x^5 − x^3 − x^2 + 3x

Step-by-step explanation:

I got that by combining like terms.

(7x^5) + (3x^4 + −3x^4) + (2x^3 + −3x^3) + (−5x^2 + 4x^2) + (5x + −2x)

the answer isn't in the picture the closest would be A so idk if i made a mistake but I hope u still understand how to solve it :)