Why is x squared plus 4x plus 16 not a perfect square trinomial

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a