Catherine owns a bakery. She takes x minutes to bake a tray of cookies. The time it takes is less than 18 minutes. Which inequality represents this?
A. 18 > x
B. x = 18
C. X > 18
D. 18.< x

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

What is the sum of these mixed numbers 2 1/8 + 4 3/8