Which is the best estimate for the following quotient

What number should be added to both sides of the equation to complete this square? x^2-10x=7

What does the relationship between the mean and median reveal about the shape of the data

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet