In quadrilateral abcd, assume that angle a = 90 degrees = angle c. draw diagonals ac and bd and show that angle dac = angle dbc.

Which of these choices show a pair of equivalent expressions?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Which statement accurately explains whether a reflection over the y axis and a 270° counterclockwise rotation would map figure acb onto itself?