Joshua's math textbook weighs 43.21 ounces. his social studies book weighs 38.99 ounces. what is the difference in weight between the two books?

Which represents the solution set of the inequality 5x-9 < 21? a. x < 12/5 b. x > 12/5 c. x > 6 d. x < 6

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

Yesterday, george drank 1 small bottle and 2 large bottles, for a total of 1,372 grams. the day before , he drank 1 small bottle and 1 large bottle, for the total of 858 grams. how many grams does each bottle hold?