Which coordinate for points a' and b' would prove that lines ab and a'b' are perpendicular?

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Classify the following triangle check all that apply

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)