Finding math a bit tough during online school, hoping for some help with this :)

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

Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm