3. Make a sketch to illustrate the following:
"AABC is right angled at B. E is the midpoint of AC. BE is produced
to D so that AD is parallel to BC"

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.

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)

step-by-step explanation:

i think its about 8