53 decreased by twice Mai's score

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?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers