If you toss two dice and add the numbers facing up, what is the probability that the sum of the dice equals 5 or the sum of the dice is even?

Polynomial that can be factored as (3x-4)(3x+4)

True or false? a circle could be circumscribed about the quadrilateral below.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?