Is this equation linear? 1/3x-2y=7 i need asap

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .