Hattie had $2100 to invest and wants to earn 2.5% interest per year. She will put some of the money into an account that earns 2% per year and the rest into an account that earns 4.1% per year. How much money should she put into each account?

e

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.