Pls help 15 points there is also a hint at the bottom i dont know if it helps..

The data represents the semester exam scores of 8 students in a math course. {51,91,46,30,36,50,73,80} what is the five-number summary?

Which of the following lines does not intersect the line y=-2x+3 ? a) y=2x b) y=2x-3 c) y=2x+3 d) y=-2x-3

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?