$500 decaying at a rate of 27% per year

After the first year it will now be worth $365

Step-by-step explanation:

500 decrease 27% =

500 × (1 - 27%) = 500 × (1 - 0.27) = 365

Step-by-step explanation:

is only a line? i think so

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.