David purchase a car for $34,500 the value of the car will decrease each year at a rate of 16.5 what is the approximate equivalent month decrease rate

It will decrease by 150 dollars a month.

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.

it would be a on edgenuit y

the diagram below is your final answer