If x²+nx+2n-4=0 has 1 real solution, m, find m+n

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

Is the orthocenter of a triangle on the inside ?

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.