Can someone answer a b c or d? thanks!

What is the value of 1/3× + 7x, when x =5

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?

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles