loan from a bank for 7700 for 4 months at a annual rate of 5.35%. Assume each month is 1/12 of a year . Find the interest owed after 4 months

Aregression was run to determine if there is a relationship between hours of tv watched per day (x) and number of situps a person can do (y). the results of the regression were: y=ax+b a=-0.662 b=30.418 r2=0.703921 r=-0.839

Can anyone explain to me how to do this? anything will .

16x^2-16x=5 solve the equation by completing the square