How to turn -13 into a improper fraction

Which expression and diagram represent “renee biked four times as far this month as last month”?

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?

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.