Ellen wants to purchase a book that is regularly priced at $18. the book is discounted 15%. she also needs to pay a 6% sales tax on the discounted price. what is the total amount ellen will pay for the book? enter your answer in the box.

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.