Vanessa asked students at her school whether they save aluminum cans or
glass bottles for recycling. Of the
students surveyed, 69 save cans, 56
save bottles, 41 save both, and 8 save
neither. How many students:
S. save cans but not bottles?
A. save either cans or bottles?
E. were in the survey altogether?

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.

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation:

"exterior angles = 360 / number of sides.

60 = 360 / sides

sides = 360 / 60

sides = 6"