Ricardo tiene 2 800 el banco le pago 8% de interés en su cuenta por cada tres meses sí dejó esa cantidad de dinero por 9 meses cuánto recibiría al retirar su dinero del banco

step-by-step explanation:

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.

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol