Someone pls help I can’t understand this question at all

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.