the measure of one angle is 3° more than 1/2 the measure of its supplement write and solve an algebraic equation to find the measure of each angle. I need help! Can someone plz help me!

What is the length of the unknown leg in the right triangle ?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.