11. a) A mobile price is tagged Rs 5,000. If a customer gets 12% discount and adding certain percent VAT reaches as Rs 4,972, find out the VAT percentage.

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.

a) 0,0; 1,1; and 2,2

step-by-step explanation:

these have the exact same coordinates, thus they are the correct function.