Mrs. bennett has graded 20%of her students paper. if she graded 30 papers, how many total papers did she grade?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).