Can you show work for all of these and match them

What is the square root of 45? (step by step working plz)

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

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x