1.6 y - 0.7 + 3.8y + 2

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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?

Select all of the following expressions that are equal to 2.5.