Jordan flipped a coin 218 times. Which of the following would be a good estimate of the number of times the coin landed on heads? A. 168
B. 104
C. 209
D. 34

Ans: (1/2)218 = 109

Closest to that is 104

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.