Urgent!! Please answer this. thankyou!

In the final round of trivia competition, contestants were asked to name as many states that begin with the letter m as they could in 15 seconds. the bar graph shows the number of states the contestants were able to name. how many contestants participated in the final round of the competition?

Guys i really need or i have to stay late up night

Solve the equation by completing the square. x^2+2x=17