A sector with an area of 140pi cm2 has a radius of 20 what is the central angle in degrees

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

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.