True of false a circle could be circumscribed about the quadrilateral below?

What is the slope of a line that is perpendicular to y = 3x + 1

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.