The diagonals of a rhombus are perpendicular.

a) always
b) sometimes < -- my answer
c) never

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?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Find the cocordinatse of the point on y axis which is nearest to the point (-2,5)