Richard paid a total of $3,216 in utility bills this year. That is 20% more than it was last year. What was the total amount that Richard paid for utility bills last year?

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.