What is the measure of tje fourth angle of the quadrilateral

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?

Hich polynomial correctly combines the like terms and expresses the given polynomial in standard form? 8mn5 – 2m6 + 5m2n4 – m3n3 + n6 – 4m6 + 9m2n4 – mn5 – 4m3n3