Two angles of a triangle measure 42° and 84°. find the measure of the third angle, in degrees. (enter an exact number.)

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?

Select the correct answer from each drop down menu

Icould really use some with this question.