3. Use method of completing the square to evaluate 2x^2+ 5x = 8

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

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16