Answer it for Brainliest *URGENT*

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?

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.