If 1/4cotx - 11 = -9, then cotx = 1/2 5 8 80

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

What is another way to express 36 +32

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?