Given: ac and bd bisect each other. What is the reason for step 3 of this proof

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Write 37/22 as a decimal rounded to the nearest hundredth.