Look at the photo it's summation notation

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?