If angle 1 and angle 3 are vertical, explain why it will always be true that angle 1 and angle 3 are congruent angles. Prove it without using specific measurements for the angles.

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

What are the sotions to the quadratic equation 9x^2=4