If quadrilateral ABCD is a trapezoid and the slope of AB is 3, then the slope of CD is 3. Is it Always, Sometimes, Never and why?

Can someone me out here and the tell me the greatest common factor

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?

Select all of the following expressions that are equal to 2.5.