Connor said, "too the nearest hundred, i've attended school for 800 days of my life! " state 3 numbers that could be the actual number of days connor has attended school.

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.

the answer is y = 11.54

hope this : )