A store is having a sale where everything is 15% off. Which expression below does not represent the cost of an item in the store? Select all that apply.

A
0.85c

B
c−0.85c

C
c−0.15c

D
85100c

E
15100c

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.