Difference of 9p3q2 and 13p3q2

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate

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.