State if each triangle is Obtuse, right, or acute

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.

What is the solution to this system of linear equations? 2x + 3y = 3 tx-3y= 24

Acard is drawn from a standard deck of 52 cards what is the probability this card will be a king or an ace