You would at the distances together, since 120 is above sea level and 39 is below. To find the whole vertical distance (the distance they are apart), just add the values (numbers) together.


I hope this helps!
~kaikers
You times 4 by everything inside the parentheses, so the answer would be as follows. 16a + 20b - 12
Answer:
1) 4x^2, 3x, -11y, 17 (4 terms)
2) 4, 3, -11, 17 (4 coefficients)
3) none
Step-by-step explanation: