The cables between the two towers of the Tacoma Narrows Bridge in Washington form a parabola that can be modeled by y=0.00016x^2-0.46x+507 , where x and y are measured in feet. What is the height of the cable above the water at its lowest point?

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

c

-by-step explanation:

it would be c