Amuseum director wants to hang the painting on a wall. To the nearest foot, how tall does the wall
need to be?
90ft

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.

it would be a on edgenuit y

the diagram below is your final answer

you just switch the numbers basically so it would be 3/17