An item is regularly priced at $91. chris bought it at a discount 55% off the regular price. how much did chris pay

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.

thats not a system of equations, that is a solution