13) According to Wikipedia, the common swift has a maximum horizontal speed of 111.6 km/h
Convert this speed to meters per second.

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.

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy