IS THIS RIGHT AND ILL GIVE U A RATE A THANKS AND A FOLLOW AND BRAINLIES

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

The sum of two numbers is 86, and their difference is 20. find the two numbers

Line l passes through points (0,4) and (3,6) what is the slope of a line that is parallel to line l -2/3 -3/2 2/3 3/2