Ihope that no one ignore my question as i really need your . plz me

Kevin has just finished paying off his loan. he was assessed a service charge of $422. he paid off the principal and the interest by making weekly payments of $36.13 for four years. if the principal was $7,150, how much did kevin pay in finance charges, to the nearest dollar? a. $498 b. $365 c. $422 d. $787

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

What is the length of an with endpoints a 3,2 and b 8,14