Solve each question by linear equation (method of your choice)
I need help

Me write an equation for the interior angles of this triangle that uses the triangle sum theorem

Identify whether the figure has plane symmetry, symmetry about an axis, or neither.

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