What is 8x+6+2+12x simplify

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 length of the unknown leg in the right triangle ?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?