Please help!! This is due today! - Which of the following represents all the solutions to the following equation: 2x +4y =12
(Attached are the answer choices)
I used desmos and the graph was exactly the same as b, but a has more solutions and correct solutions according to the graph. so now I am very confused :(
Giving 15-20 points! Pls help.

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°