Hiya!me: (find the area of an equilateral triangle with sides of 4ft

now, is an equliateral triangle, so all sides are equal, if one side is 4ft, all three sides are 4ft.

the answer will be the last one

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.