Solve the inequality x + 18 ≤ - 3?
please help i am very confused :,)

Which expression will have the same sum as 3_8 + 1/4?

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?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.