Ihave three questions:
1. 4 students from a class of 15 are going to be chosen to be on the dance committee. find the number of different 4-person committees that can be made.
2. leslie has 7 books. there is enough space on a shelf for 3 books. in how many ways can 3 of the 7 books be arranged on the shelf? (for this one i keep getting the answer 35, but its coming up wrong on my assignment.)
3. out of the 12 girls who tried out for the softball team, 10 will be chosen for the team. find the number of different 10-person teams.

Create a graph for the demand for starfish using the following data table: quantity/price of starfish quantity (x axis) of starfish in dozens price (y axis) of starfish per dozen 0 8 2 6 3 5 5 2 7 1 9 0 is the relationship between the price of starfish and the quantity demanded inverse or direct? why? how many dozens of starfish are demanded at a price of five? calculate the slope of the line between the prices of 6 (quantity of 2) and 1 (quantity of 7) per dozen. describe the line when there is a direct relationship between price and quantity.