Sam has 15 books mia has 20 books how many do they have. together.

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

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)