If -7 is the x-intercept of line L, what is the slope and y-intercept of line L

Solve |x| > -9 a) {x|x< -9 or x> 9} b) all reals c) no solution

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Which one is true about the hexagons ?