Question
Mary bought some Biology books at $7 each. She also bought an equal number of History books at a different price. The average price of one Biology and one History book was $5. Mary paid $44 less for the History books than the Biology books.
  1. What was the cost of one History book?
  2. How many Biology books did Mary buy?
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Mary bought some Biology books at $7 each. She also bought an equal number of History books at a different price. The average price of one Biology and one History book was $5. Mary paid $44 less for the History books than the Biology books.
  1. What was the cost of one History book?
  2. How many Biology books did Mary buy?