Brainliest to first answer and points and my soul because math is more the elevation of city a is 80 feet below sea level; the elevation of city c is 16 feet below sea level. the elevation of city d is 1 over 2 of the elevation of city c. part a: write an expression to represent the elevation, in feet, of city d. part b: solve the expression and explain why the answer is negative or positive.