Two–thirds of the children in the fourth–grade class are girls. if there are 18 girls, what is the total number of children in the class?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Which statement describes surface features called maria on the moon