Solve the inequality: y - 18 < 55

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?

Multiplying fractions by whole number 5 x 1/3=?

Express -5 2/5 as an improper fraction.