Anna bought a new computer for $859 using a 24-month loan with a 18.99% interest rate. How
much will she have paid in total at the end of
the loan?

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.

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.