A pharmacist filled a prescription for Ana to
take 1/5 of the medicine
in the morning, 1/2
during lunch, and the
rest at night. How
much of the medicine
does she take at night?

your answer is d 2,500

step-by-step explanation:

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.