What does this xxxix mean?

How much is a 9-year-old supposed to weigh? How do you make 2.32 cents out of 15 coins? What are the two ways of describing set in mathematics? What is equivalent fraction to 5 over 10? What do you do when you get to the parenthesis on an expression mat? What is the representative fraction fora verbal scale of 1 inch reprisents 25 miles? What is the area of a 3.4 by 5.6 inch trapezoid? How do you convert larger units of measurement to small ones? What are things to be remembered with words being simple writing? What does 7 over 3 equal? How do you find the volume of a Cylinder tube Hollow when the diameter is 450mm Thickness is 25mm and the Length is 6.5 M meters? Is the number 225 even or odd? What is 15 times 0 times 13 plus 7? Is the degree of the polynomial 3x4 plus 4x3 - 3x4 plus 5x plus 1 is 3? Chemical formula for ozone? Write five things that are considered matter? What 0.16 with only the 6 repeating as a fraction in simplest form? Which accounts have distribution list allowing access to a product to a specified number of people? What can you not have in a quadratic equation? What is -4-(-5)?