What is the interquartile range for the following data set? {5,6,7,3,9,8,3,1,6,7,7}

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

What is the value of x in the diagram below?

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list