The ratio of Tom to David's age is 4:5. The difference in their age is 9 years. How old is David?

The table shows a pattern of exponents. what is the pattern as the exponents decrease?

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Find the value of x. give reasons to justify your solutions! c ∈ ae