What is x? use the pythagorean theorem

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay