The figure shows a triangle with an exterior angle at each vertex. 8yº
1419
127°
What is the value of y?

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

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.