If x = –3 is the only x-intercept of the graph of a quadratic equation, what is the best description of the discriminant of the equation?
a. the discriminant is negative.
b. the discriminant is –3.
c. the discriminant is 0.
d. the discriminant is positive. oi

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.