Which equations can be used to determine the area of the irregular figure? check all that apply.

a= 3(5) + 1/2(5)(6)
a= 1/2(5)(9) + 1/2(3)(5)
a= 1/2(3)(5)(9)
a= 3(5)(9)
a= 1/2(5)(9) + 3(5)
a= 3(5) + 6(5)

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.