Help me, please. I need your help guys

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 slope of the line that contains the points (-2,1) and (0,-3)

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.