Which equation contains a perfect square trinomial? X^2 - 6x +72=0

X^2-5x+ 64=0

X^2 + 14x+49=0

X^2+2x-4=0

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

If angle 2=3x +1 and angle 3=2x +4what is angle 2

Describe the relationship between the angles of similar triangles and the sides of similar triangles