Which equation is correct regarding the diagram of circle O?
mZXZY = 1/2(a+b)
mZXZY = 1/2(a−b)
OmZXoY = 1/2(a+b)
OmZXOY = 1/2(a-b)

Which statement accurately explains whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure acb onto itself? a coordinate plane with figure acb with point a at 1, 1, c at 3, 4 and b at 5, 1 yes, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) yes, a″c″b′ is located at a″(1, 1), c″(3, 4), and b″(5, 1) no, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) no, a″c″b″ is located at a″(1, 1), c″(3, 4), and b″(5, 1)

Which of the choices shown could be used to prove that aacp=abcp ?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?