Lesson 9

If a represents the number of almonds Riley has before eating any, what is the algebraic expression for Riley eating 10 of them?

Julie works 10 times as many hours this week as she worked last week. How many hours did she work this week?

Students are split into groups of 10. How many groups are there?

Julie and Noah play a card game. In the first round, Julie scores 200 points, and Noah scores 175 points. If Julie has j points, how many points does Noah have?

If x represents the amount of money in dollars someone had before spending any money at the concession stand, which expression represents the amount of money they have left after spending $2.50?

If a book has 175 pages and x represents the number of pages read so far, the number of pages left to read in the book is (a)   .