Please help me with this Q! =)

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Adriveway is 40 yards long about how many meters long is it

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.