PLZZZ HELP ME I BEGGING YOU THIS DUE TODAY!!!!plzzz answer all questions correctly plz and explain and give the answer

1. A driver’s elevation is -30 feet relative to sea level. She dives down 12 feet. What is the elevation after the dive? Show your work. (20 points)







2.Explain(In your own word) how to model -5+5+(-2) on the number line. (20 points)





3. How do you subtract an integer from another integer without using a number line ? Give an example. (20 points)