Question
Barbara bought some Chemistry books at $13 each. She also bought an equal number of History books at a different price. The average price of one Chemistry and one History book was $8. Barbara paid $20 more for the Chemistry books than the History books.
  1. What was the cost of one History book?
  2. How many Chemistry books did Barbara buy?
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Barbara bought some Chemistry books at $13 each. She also bought an equal number of History books at a different price. The average price of one Chemistry and one History book was $8. Barbara paid $20 more for the Chemistry books than the History books.
  1. What was the cost of one History book?
  2. How many Chemistry books did Barbara buy?