Is x=2y a proportional relationship??

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

5(-9w) put expression in distributive property

Which of these triangle pairs can be mapped to each other using two reflections?