Simple question about slopes of parallel lines and perpendicular lines

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

Can someone me with the property questions for 12 13 and 14 plz