Eight less than three times the difference of a number and two Write that but as an equation pls

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

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?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?