Find the profit function if cost and revenue are given by c(x)equals=131131plus+2.92.9x and upper r left parenthesis x right parenthesis equals 3 x minus 0.08 x squared .r(x)=3x−0.08x2.

firstly, profit = revenue - cost

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.