On average, 1 in 78 people have pancreatic cancer. How many people would you expect to have to ask before one says he or she has pancreatic cancer? By how many people would this number vary?

Not sure where to start with this one.

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?